Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 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 | * |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 8 | * Copyright 2009 Integrated Device Technology, Inc. |
| 9 | * Alex Bounine <alexandre.bounine@idt.com> |
| 10 | * - Added Port-Write/Error Management initialization and handling |
| 11 | * |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | */ |
| 17 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 18 | #include <linux/types.h> |
| 19 | #include <linux/kernel.h> |
| 20 | |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/rio.h> |
| 24 | #include <linux/rio_drv.h> |
| 25 | #include <linux/rio_ids.h> |
| 26 | #include <linux/rio_regs.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/spinlock.h> |
Tim Schmielau | de25968 | 2006-01-08 01:02:05 -0800 | [diff] [blame] | 29 | #include <linux/slab.h> |
Kumar Gala | 5febf1c | 2008-01-23 05:53:47 -0600 | [diff] [blame] | 30 | #include <linux/interrupt.h> |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 31 | |
| 32 | #include "rio.h" |
| 33 | |
| 34 | static LIST_HEAD(rio_mports); |
| 35 | |
| 36 | /** |
| 37 | * rio_local_get_device_id - Get the base/extended device id for a port |
| 38 | * @port: RIO master port from which to get the deviceid |
| 39 | * |
| 40 | * Reads the base/extended device id from the local device |
| 41 | * implementing the master port. Returns the 8/16-bit device |
| 42 | * id. |
| 43 | */ |
| 44 | u16 rio_local_get_device_id(struct rio_mport *port) |
| 45 | { |
| 46 | u32 result; |
| 47 | |
| 48 | rio_local_read_config_32(port, RIO_DID_CSR, &result); |
| 49 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 50 | return (RIO_GET_DID(port->sys_size, result)); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | /** |
| 54 | * rio_request_inb_mbox - request inbound mailbox service |
| 55 | * @mport: RIO master port from which to allocate the mailbox resource |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 56 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 57 | * @mbox: Mailbox number to claim |
| 58 | * @entries: Number of entries in inbound mailbox queue |
| 59 | * @minb: Callback to execute when inbound message is received |
| 60 | * |
| 61 | * Requests ownership of an inbound mailbox resource and binds |
| 62 | * a callback function to the resource. Returns %0 on success. |
| 63 | */ |
| 64 | int rio_request_inb_mbox(struct rio_mport *mport, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 65 | void *dev_id, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 66 | int mbox, |
| 67 | int entries, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 68 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 69 | int slot)) |
| 70 | { |
| 71 | int rc = 0; |
| 72 | |
| 73 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
| 74 | |
| 75 | if (res) { |
| 76 | rio_init_mbox_res(res, mbox, mbox); |
| 77 | |
| 78 | /* Make sure this mailbox isn't in use */ |
| 79 | if ((rc = |
| 80 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], |
| 81 | res)) < 0) { |
| 82 | kfree(res); |
| 83 | goto out; |
| 84 | } |
| 85 | |
| 86 | mport->inb_msg[mbox].res = res; |
| 87 | |
| 88 | /* Hook the inbound message callback */ |
| 89 | mport->inb_msg[mbox].mcback = minb; |
| 90 | |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 91 | rc = rio_open_inb_mbox(mport, dev_id, mbox, entries); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 92 | } else |
| 93 | rc = -ENOMEM; |
| 94 | |
| 95 | out: |
| 96 | return rc; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * rio_release_inb_mbox - release inbound mailbox message service |
| 101 | * @mport: RIO master port from which to release the mailbox resource |
| 102 | * @mbox: Mailbox number to release |
| 103 | * |
| 104 | * Releases ownership of an inbound mailbox resource. Returns 0 |
| 105 | * if the request has been satisfied. |
| 106 | */ |
| 107 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) |
| 108 | { |
| 109 | rio_close_inb_mbox(mport, mbox); |
| 110 | |
| 111 | /* Release the mailbox resource */ |
| 112 | return release_resource(mport->inb_msg[mbox].res); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * rio_request_outb_mbox - request outbound mailbox service |
| 117 | * @mport: RIO master port from which to allocate the mailbox resource |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 118 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 119 | * @mbox: Mailbox number to claim |
| 120 | * @entries: Number of entries in outbound mailbox queue |
| 121 | * @moutb: Callback to execute when outbound message is sent |
| 122 | * |
| 123 | * Requests ownership of an outbound mailbox resource and binds |
| 124 | * a callback function to the resource. Returns 0 on success. |
| 125 | */ |
| 126 | int rio_request_outb_mbox(struct rio_mport *mport, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 127 | void *dev_id, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 128 | int mbox, |
| 129 | int entries, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 130 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 131 | { |
| 132 | int rc = 0; |
| 133 | |
| 134 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
| 135 | |
| 136 | if (res) { |
| 137 | rio_init_mbox_res(res, mbox, mbox); |
| 138 | |
| 139 | /* Make sure this outbound mailbox isn't in use */ |
| 140 | if ((rc = |
| 141 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], |
| 142 | res)) < 0) { |
| 143 | kfree(res); |
| 144 | goto out; |
| 145 | } |
| 146 | |
| 147 | mport->outb_msg[mbox].res = res; |
| 148 | |
| 149 | /* Hook the inbound message callback */ |
| 150 | mport->outb_msg[mbox].mcback = moutb; |
| 151 | |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 152 | rc = rio_open_outb_mbox(mport, dev_id, mbox, entries); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 153 | } else |
| 154 | rc = -ENOMEM; |
| 155 | |
| 156 | out: |
| 157 | return rc; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * rio_release_outb_mbox - release outbound mailbox message service |
| 162 | * @mport: RIO master port from which to release the mailbox resource |
| 163 | * @mbox: Mailbox number to release |
| 164 | * |
| 165 | * Releases ownership of an inbound mailbox resource. Returns 0 |
| 166 | * if the request has been satisfied. |
| 167 | */ |
| 168 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) |
| 169 | { |
| 170 | rio_close_outb_mbox(mport, mbox); |
| 171 | |
| 172 | /* Release the mailbox resource */ |
| 173 | return release_resource(mport->outb_msg[mbox].res); |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * rio_setup_inb_dbell - bind inbound doorbell callback |
| 178 | * @mport: RIO master port to bind the doorbell callback |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 179 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 180 | * @res: Doorbell message resource |
| 181 | * @dinb: Callback to execute when doorbell is received |
| 182 | * |
| 183 | * Adds a doorbell resource/callback pair into a port's |
| 184 | * doorbell event list. Returns 0 if the request has been |
| 185 | * satisfied. |
| 186 | */ |
| 187 | static int |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 188 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
| 189 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 190 | u16 info)) |
| 191 | { |
| 192 | int rc = 0; |
| 193 | struct rio_dbell *dbell; |
| 194 | |
| 195 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { |
| 196 | rc = -ENOMEM; |
| 197 | goto out; |
| 198 | } |
| 199 | |
| 200 | dbell->res = res; |
| 201 | dbell->dinb = dinb; |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 202 | dbell->dev_id = dev_id; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 203 | |
| 204 | list_add_tail(&dbell->node, &mport->dbells); |
| 205 | |
| 206 | out: |
| 207 | return rc; |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * rio_request_inb_dbell - request inbound doorbell message service |
| 212 | * @mport: RIO master port from which to allocate the doorbell resource |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 213 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 214 | * @start: Doorbell info range start |
| 215 | * @end: Doorbell info range end |
| 216 | * @dinb: Callback to execute when doorbell is received |
| 217 | * |
| 218 | * Requests ownership of an inbound doorbell resource and binds |
| 219 | * a callback function to the resource. Returns 0 if the request |
| 220 | * has been satisfied. |
| 221 | */ |
| 222 | int rio_request_inb_dbell(struct rio_mport *mport, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 223 | void *dev_id, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 224 | u16 start, |
| 225 | u16 end, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 226 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 227 | u16 dst, u16 info)) |
| 228 | { |
| 229 | int rc = 0; |
| 230 | |
| 231 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
| 232 | |
| 233 | if (res) { |
| 234 | rio_init_dbell_res(res, start, end); |
| 235 | |
| 236 | /* Make sure these doorbells aren't in use */ |
| 237 | if ((rc = |
| 238 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], |
| 239 | res)) < 0) { |
| 240 | kfree(res); |
| 241 | goto out; |
| 242 | } |
| 243 | |
| 244 | /* Hook the doorbell callback */ |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 245 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 246 | } else |
| 247 | rc = -ENOMEM; |
| 248 | |
| 249 | out: |
| 250 | return rc; |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * rio_release_inb_dbell - release inbound doorbell message service |
| 255 | * @mport: RIO master port from which to release the doorbell resource |
| 256 | * @start: Doorbell info range start |
| 257 | * @end: Doorbell info range end |
| 258 | * |
| 259 | * Releases ownership of an inbound doorbell resource and removes |
| 260 | * callback from the doorbell event list. Returns 0 if the request |
| 261 | * has been satisfied. |
| 262 | */ |
| 263 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) |
| 264 | { |
| 265 | int rc = 0, found = 0; |
| 266 | struct rio_dbell *dbell; |
| 267 | |
| 268 | list_for_each_entry(dbell, &mport->dbells, node) { |
| 269 | if ((dbell->res->start == start) && (dbell->res->end == end)) { |
| 270 | found = 1; |
| 271 | break; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | /* If we can't find an exact match, fail */ |
| 276 | if (!found) { |
| 277 | rc = -EINVAL; |
| 278 | goto out; |
| 279 | } |
| 280 | |
| 281 | /* Delete from list */ |
| 282 | list_del(&dbell->node); |
| 283 | |
| 284 | /* Release the doorbell resource */ |
| 285 | rc = release_resource(dbell->res); |
| 286 | |
| 287 | /* Free the doorbell event */ |
| 288 | kfree(dbell); |
| 289 | |
| 290 | out: |
| 291 | return rc; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * rio_request_outb_dbell - request outbound doorbell message range |
| 296 | * @rdev: RIO device from which to allocate the doorbell resource |
| 297 | * @start: Doorbell message range start |
| 298 | * @end: Doorbell message range end |
| 299 | * |
| 300 | * Requests ownership of a doorbell message range. Returns a resource |
| 301 | * if the request has been satisfied or %NULL on failure. |
| 302 | */ |
| 303 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, |
| 304 | u16 end) |
| 305 | { |
| 306 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
| 307 | |
| 308 | if (res) { |
| 309 | rio_init_dbell_res(res, start, end); |
| 310 | |
| 311 | /* Make sure these doorbells aren't in use */ |
| 312 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) |
| 313 | < 0) { |
| 314 | kfree(res); |
| 315 | res = NULL; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | return res; |
| 320 | } |
| 321 | |
| 322 | /** |
| 323 | * rio_release_outb_dbell - release outbound doorbell message range |
| 324 | * @rdev: RIO device from which to release the doorbell resource |
| 325 | * @res: Doorbell resource to be freed |
| 326 | * |
| 327 | * Releases ownership of a doorbell message range. Returns 0 if the |
| 328 | * request has been satisfied. |
| 329 | */ |
| 330 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) |
| 331 | { |
| 332 | int rc = release_resource(res); |
| 333 | |
| 334 | kfree(res); |
| 335 | |
| 336 | return rc; |
| 337 | } |
| 338 | |
| 339 | /** |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 340 | * rio_request_inb_pwrite - request inbound port-write message service |
Randy Dunlap | 97ef6f7 | 2010-05-28 15:08:08 -0700 | [diff] [blame] | 341 | * @rdev: RIO device to which register inbound port-write callback routine |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 342 | * @pwcback: Callback routine to execute when port-write is received |
| 343 | * |
| 344 | * Binds a port-write callback function to the RapidIO device. |
| 345 | * Returns 0 if the request has been satisfied. |
| 346 | */ |
| 347 | int rio_request_inb_pwrite(struct rio_dev *rdev, |
| 348 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) |
| 349 | { |
| 350 | int rc = 0; |
| 351 | |
| 352 | spin_lock(&rio_global_list_lock); |
| 353 | if (rdev->pwcback != NULL) |
| 354 | rc = -ENOMEM; |
| 355 | else |
| 356 | rdev->pwcback = pwcback; |
| 357 | |
| 358 | spin_unlock(&rio_global_list_lock); |
| 359 | return rc; |
| 360 | } |
| 361 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); |
| 362 | |
| 363 | /** |
| 364 | * rio_release_inb_pwrite - release inbound port-write message service |
| 365 | * @rdev: RIO device which registered for inbound port-write callback |
| 366 | * |
| 367 | * Removes callback from the rio_dev structure. Returns 0 if the request |
| 368 | * has been satisfied. |
| 369 | */ |
| 370 | int rio_release_inb_pwrite(struct rio_dev *rdev) |
| 371 | { |
| 372 | int rc = -ENOMEM; |
| 373 | |
| 374 | spin_lock(&rio_global_list_lock); |
| 375 | if (rdev->pwcback) { |
| 376 | rdev->pwcback = NULL; |
| 377 | rc = 0; |
| 378 | } |
| 379 | |
| 380 | spin_unlock(&rio_global_list_lock); |
| 381 | return rc; |
| 382 | } |
| 383 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); |
| 384 | |
| 385 | /** |
| 386 | * rio_mport_get_physefb - Helper function that returns register offset |
| 387 | * for Physical Layer Extended Features Block. |
Randy Dunlap | 97ef6f7 | 2010-05-28 15:08:08 -0700 | [diff] [blame] | 388 | * @port: Master port to issue transaction |
| 389 | * @local: Indicate a local master port or remote device access |
| 390 | * @destid: Destination ID of the device |
| 391 | * @hopcount: Number of switch hops to the device |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 392 | */ |
| 393 | u32 |
| 394 | rio_mport_get_physefb(struct rio_mport *port, int local, |
| 395 | u16 destid, u8 hopcount) |
| 396 | { |
| 397 | u32 ext_ftr_ptr; |
| 398 | u32 ftr_header; |
| 399 | |
| 400 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); |
| 401 | |
| 402 | while (ext_ftr_ptr) { |
| 403 | if (local) |
| 404 | rio_local_read_config_32(port, ext_ftr_ptr, |
| 405 | &ftr_header); |
| 406 | else |
| 407 | rio_mport_read_config_32(port, destid, hopcount, |
| 408 | ext_ftr_ptr, &ftr_header); |
| 409 | |
| 410 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); |
| 411 | switch (ftr_header) { |
| 412 | |
| 413 | case RIO_EFB_SER_EP_ID_V13P: |
| 414 | case RIO_EFB_SER_EP_REC_ID_V13P: |
| 415 | case RIO_EFB_SER_EP_FREE_ID_V13P: |
| 416 | case RIO_EFB_SER_EP_ID: |
| 417 | case RIO_EFB_SER_EP_REC_ID: |
| 418 | case RIO_EFB_SER_EP_FREE_ID: |
| 419 | case RIO_EFB_SER_EP_FREC_ID: |
| 420 | |
| 421 | return ext_ftr_ptr; |
| 422 | |
| 423 | default: |
| 424 | break; |
| 425 | } |
| 426 | |
| 427 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, |
| 428 | hopcount, ext_ftr_ptr); |
| 429 | } |
| 430 | |
| 431 | return ext_ftr_ptr; |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag |
Randy Dunlap | 97ef6f7 | 2010-05-28 15:08:08 -0700 | [diff] [blame] | 436 | * @comp_tag: RIO component tag to match |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 437 | * @from: Previous RIO device found in search, or %NULL for new search |
| 438 | * |
| 439 | * Iterates through the list of known RIO devices. If a RIO device is |
| 440 | * found with a matching @comp_tag, a pointer to its device |
| 441 | * structure is returned. Otherwise, %NULL is returned. A new search |
| 442 | * is initiated by passing %NULL to the @from argument. Otherwise, if |
| 443 | * @from is not %NULL, searches continue from next device on the global |
| 444 | * list. |
| 445 | */ |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 446 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 447 | { |
| 448 | struct list_head *n; |
| 449 | struct rio_dev *rdev; |
| 450 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 451 | spin_lock(&rio_global_list_lock); |
| 452 | n = from ? from->global_list.next : rio_devices.next; |
| 453 | |
| 454 | while (n && (n != &rio_devices)) { |
| 455 | rdev = rio_dev_g(n); |
| 456 | if (rdev->comp_tag == comp_tag) |
| 457 | goto exit; |
| 458 | n = n->next; |
| 459 | } |
| 460 | rdev = NULL; |
| 461 | exit: |
| 462 | spin_unlock(&rio_global_list_lock); |
| 463 | return rdev; |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. |
| 468 | * @rdev: Pointer to RIO device control structure |
| 469 | * @pnum: Switch port number to set LOCKOUT bit |
| 470 | * @lock: Operation : set (=1) or clear (=0) |
| 471 | */ |
| 472 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) |
| 473 | { |
| 474 | u8 hopcount = 0xff; |
| 475 | u16 destid = rdev->destid; |
| 476 | u32 regval; |
| 477 | |
| 478 | if (rdev->rswitch) { |
| 479 | destid = rdev->rswitch->destid; |
| 480 | hopcount = rdev->rswitch->hopcount; |
| 481 | } |
| 482 | |
| 483 | rio_mport_read_config_32(rdev->net->hport, destid, hopcount, |
| 484 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
| 485 | ®val); |
| 486 | if (lock) |
| 487 | regval |= RIO_PORT_N_CTL_LOCKOUT; |
| 488 | else |
| 489 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; |
| 490 | |
| 491 | rio_mport_write_config_32(rdev->net->hport, destid, hopcount, |
| 492 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
| 493 | regval); |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | /** |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 498 | * rio_chk_dev_route - Validate route to the specified device. |
| 499 | * @rdev: RIO device failed to respond |
| 500 | * @nrdev: Last active device on the route to rdev |
| 501 | * @npnum: nrdev's port number on the route to rdev |
| 502 | * |
| 503 | * Follows a route to the specified RIO device to determine the last available |
| 504 | * device (and corresponding RIO port) on the route. |
| 505 | */ |
| 506 | static int |
| 507 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) |
| 508 | { |
| 509 | u32 result; |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 510 | int p_port, dstid, rc = -EIO; |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 511 | struct rio_dev *prev = NULL; |
| 512 | |
| 513 | /* Find switch with failed RIO link */ |
| 514 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { |
| 515 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { |
| 516 | prev = rdev->prev; |
| 517 | break; |
| 518 | } |
| 519 | rdev = rdev->prev; |
| 520 | } |
| 521 | |
| 522 | if (prev == NULL) |
| 523 | goto err_out; |
| 524 | |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 525 | dstid = (rdev->pef & RIO_PEF_SWITCH) ? |
| 526 | rdev->rswitch->destid : rdev->destid; |
| 527 | p_port = prev->rswitch->route_table[dstid]; |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 528 | |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 529 | if (p_port != RIO_INVALID_ROUTE) { |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 530 | pr_debug("RIO: link failed on [%s]-P%d\n", |
| 531 | rio_name(prev), p_port); |
| 532 | *nrdev = prev; |
| 533 | *npnum = p_port; |
| 534 | rc = 0; |
| 535 | } else |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 536 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 537 | err_out: |
| 538 | return rc; |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * rio_mport_chk_dev_access - Validate access to the specified device. |
| 543 | * @mport: Master port to send transactions |
| 544 | * @destid: Device destination ID in network |
| 545 | * @hopcount: Number of hops into the network |
| 546 | */ |
Alexandre Bounine | e274e0e | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 547 | int |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 548 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
| 549 | { |
| 550 | int i = 0; |
| 551 | u32 tmp; |
| 552 | |
| 553 | while (rio_mport_read_config_32(mport, destid, hopcount, |
| 554 | RIO_DEV_ID_CAR, &tmp)) { |
| 555 | i++; |
| 556 | if (i == RIO_MAX_CHK_RETRY) |
| 557 | return -EIO; |
| 558 | mdelay(1); |
| 559 | } |
| 560 | |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | /** |
| 565 | * rio_chk_dev_access - Validate access to the specified device. |
| 566 | * @rdev: Pointer to RIO device control structure |
| 567 | */ |
| 568 | static int rio_chk_dev_access(struct rio_dev *rdev) |
| 569 | { |
| 570 | u8 hopcount = 0xff; |
| 571 | u16 destid = rdev->destid; |
| 572 | |
| 573 | if (rdev->rswitch) { |
| 574 | destid = rdev->rswitch->destid; |
| 575 | hopcount = rdev->rswitch->hopcount; |
| 576 | } |
| 577 | |
| 578 | return rio_mport_chk_dev_access(rdev->net->hport, destid, hopcount); |
| 579 | } |
| 580 | |
| 581 | /** |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 582 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and |
| 583 | * returns link-response (if requested). |
| 584 | * @rdev: RIO devive to issue Input-status command |
| 585 | * @pnum: Device port number to issue the command |
| 586 | * @lnkresp: Response from a link partner |
| 587 | */ |
| 588 | static int |
| 589 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) |
| 590 | { |
| 591 | struct rio_mport *mport = rdev->net->hport; |
| 592 | u16 destid = rdev->rswitch->destid; |
| 593 | u8 hopcount = rdev->rswitch->hopcount; |
| 594 | u32 regval; |
| 595 | int checkcount; |
| 596 | |
| 597 | if (lnkresp) { |
| 598 | /* Read from link maintenance response register |
| 599 | * to clear valid bit */ |
| 600 | rio_mport_read_config_32(mport, destid, hopcount, |
| 601 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
| 602 | ®val); |
| 603 | udelay(50); |
| 604 | } |
| 605 | |
| 606 | /* Issue Input-status command */ |
| 607 | rio_mport_write_config_32(mport, destid, hopcount, |
| 608 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
| 609 | RIO_MNT_REQ_CMD_IS); |
| 610 | |
| 611 | /* Exit if the response is not expected */ |
| 612 | if (lnkresp == NULL) |
| 613 | return 0; |
| 614 | |
| 615 | checkcount = 3; |
| 616 | while (checkcount--) { |
| 617 | udelay(50); |
| 618 | rio_mport_read_config_32(mport, destid, hopcount, |
| 619 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
| 620 | ®val); |
| 621 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { |
| 622 | *lnkresp = regval; |
| 623 | return 0; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | return -EIO; |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * rio_clr_err_stopped - Clears port Error-stopped states. |
| 632 | * @rdev: Pointer to RIO device control structure |
| 633 | * @pnum: Switch port number to clear errors |
| 634 | * @err_status: port error status (if 0 reads register from device) |
| 635 | */ |
| 636 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) |
| 637 | { |
| 638 | struct rio_mport *mport = rdev->net->hport; |
| 639 | u16 destid = rdev->rswitch->destid; |
| 640 | u8 hopcount = rdev->rswitch->hopcount; |
| 641 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
| 642 | u32 regval; |
| 643 | u32 far_ackid, far_linkstat, near_ackid; |
| 644 | |
| 645 | if (err_status == 0) |
| 646 | rio_mport_read_config_32(mport, destid, hopcount, |
| 647 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
| 648 | &err_status); |
| 649 | |
| 650 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { |
| 651 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); |
| 652 | /* |
| 653 | * Send a Link-Request/Input-Status control symbol |
| 654 | */ |
| 655 | if (rio_get_input_status(rdev, pnum, ®val)) { |
| 656 | pr_debug("RIO_EM: Input-status response timeout\n"); |
| 657 | goto rd_err; |
| 658 | } |
| 659 | |
| 660 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", |
| 661 | pnum, regval); |
| 662 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; |
| 663 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; |
| 664 | rio_mport_read_config_32(mport, destid, hopcount, |
| 665 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
| 666 | ®val); |
| 667 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); |
| 668 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; |
| 669 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ |
| 670 | " near_ackID=0x%02x\n", |
| 671 | pnum, far_ackid, far_linkstat, near_ackid); |
| 672 | |
| 673 | /* |
| 674 | * If required, synchronize ackIDs of near and |
| 675 | * far sides. |
| 676 | */ |
| 677 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || |
| 678 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { |
| 679 | /* Align near outstanding/outbound ackIDs with |
| 680 | * far inbound. |
| 681 | */ |
| 682 | rio_mport_write_config_32(mport, destid, |
| 683 | hopcount, rdev->phys_efptr + |
| 684 | RIO_PORT_N_ACK_STS_CSR(pnum), |
| 685 | (near_ackid << 24) | |
| 686 | (far_ackid << 8) | far_ackid); |
| 687 | /* Align far outstanding/outbound ackIDs with |
| 688 | * near inbound. |
| 689 | */ |
| 690 | far_ackid++; |
| 691 | if (nextdev) |
| 692 | rio_write_config_32(nextdev, |
| 693 | nextdev->phys_efptr + |
| 694 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), |
| 695 | (far_ackid << 24) | |
| 696 | (near_ackid << 8) | near_ackid); |
| 697 | else |
| 698 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); |
| 699 | } |
| 700 | rd_err: |
| 701 | rio_mport_read_config_32(mport, destid, hopcount, |
| 702 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
| 703 | &err_status); |
| 704 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); |
| 705 | } |
| 706 | |
| 707 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { |
| 708 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); |
| 709 | rio_get_input_status(nextdev, |
| 710 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); |
| 711 | udelay(50); |
| 712 | |
| 713 | rio_mport_read_config_32(mport, destid, hopcount, |
| 714 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
| 715 | &err_status); |
| 716 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); |
| 717 | } |
| 718 | |
| 719 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | |
| 720 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; |
| 721 | } |
| 722 | |
| 723 | /** |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 724 | * rio_inb_pwrite_handler - process inbound port-write message |
| 725 | * @pw_msg: pointer to inbound port-write message |
| 726 | * |
| 727 | * Processes an inbound port-write message. Returns 0 if the request |
| 728 | * has been satisfied. |
| 729 | */ |
| 730 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) |
| 731 | { |
| 732 | struct rio_dev *rdev; |
| 733 | struct rio_mport *mport; |
| 734 | u8 hopcount; |
| 735 | u16 destid; |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 736 | u32 err_status, em_perrdet, em_ltlerrdet; |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 737 | int rc, portnum; |
| 738 | |
| 739 | rdev = rio_get_comptag(pw_msg->em.comptag, NULL); |
| 740 | if (rdev == NULL) { |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 741 | /* Device removed or enumeration error */ |
| 742 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 743 | __func__, pw_msg->em.comptag); |
| 744 | return -EIO; |
| 745 | } |
| 746 | |
| 747 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); |
| 748 | |
| 749 | #ifdef DEBUG_PW |
| 750 | { |
| 751 | u32 i; |
| 752 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 753 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 754 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
| 755 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); |
| 756 | i += 4; |
| 757 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 758 | } |
| 759 | #endif |
| 760 | |
| 761 | /* Call an external service function (if such is registered |
| 762 | * for this device). This may be the service for endpoints that send |
| 763 | * device-specific port-write messages. End-point messages expected |
| 764 | * to be handled completely by EP specific device driver. |
| 765 | * For switches rc==0 signals that no standard processing required. |
| 766 | */ |
| 767 | if (rdev->pwcback != NULL) { |
| 768 | rc = rdev->pwcback(rdev, pw_msg, 0); |
| 769 | if (rc == 0) |
| 770 | return 0; |
| 771 | } |
| 772 | |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 773 | portnum = pw_msg->em.is_port & 0xFF; |
| 774 | |
| 775 | /* Check if device and route to it are functional: |
| 776 | * Sometimes devices may send PW message(s) just before being |
| 777 | * powered down (or link being lost). |
| 778 | */ |
| 779 | if (rio_chk_dev_access(rdev)) { |
| 780 | pr_debug("RIO: device access failed - get link partner\n"); |
| 781 | /* Scan route to the device and identify failed link. |
| 782 | * This will replace device and port reported in PW message. |
| 783 | * PW message should not be used after this point. |
| 784 | */ |
| 785 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { |
| 786 | pr_err("RIO: Route trace for %s failed\n", |
| 787 | rio_name(rdev)); |
| 788 | return -EIO; |
| 789 | } |
| 790 | pw_msg = NULL; |
| 791 | } |
| 792 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 793 | /* For End-point devices processing stops here */ |
| 794 | if (!(rdev->pef & RIO_PEF_SWITCH)) |
| 795 | return 0; |
| 796 | |
| 797 | if (rdev->phys_efptr == 0) { |
| 798 | pr_err("RIO_PW: Bad switch initialization for %s\n", |
| 799 | rio_name(rdev)); |
| 800 | return 0; |
| 801 | } |
| 802 | |
| 803 | mport = rdev->net->hport; |
| 804 | destid = rdev->rswitch->destid; |
| 805 | hopcount = rdev->rswitch->hopcount; |
| 806 | |
| 807 | /* |
| 808 | * Process the port-write notification from switch |
| 809 | */ |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 810 | if (rdev->rswitch->em_handle) |
| 811 | rdev->rswitch->em_handle(rdev, portnum); |
| 812 | |
| 813 | rio_mport_read_config_32(mport, destid, hopcount, |
| 814 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
| 815 | &err_status); |
| 816 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); |
| 817 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 818 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 819 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 820 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
| 821 | rdev->rswitch->port_ok |= (1 << portnum); |
| 822 | rio_set_port_lockout(rdev, portnum, 0); |
| 823 | /* Schedule Insertion Service */ |
| 824 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", |
| 825 | rio_name(rdev), portnum); |
| 826 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 827 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 828 | /* Clear error-stopped states (if reported). |
| 829 | * Depending on the link partner state, two attempts |
| 830 | * may be needed for successful recovery. |
| 831 | */ |
| 832 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | |
| 833 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { |
| 834 | if (rio_clr_err_stopped(rdev, portnum, err_status)) |
| 835 | rio_clr_err_stopped(rdev, portnum, 0); |
| 836 | } |
| 837 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 838 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 839 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 840 | rdev->rswitch->port_ok &= ~(1 << portnum); |
| 841 | rio_set_port_lockout(rdev, portnum, 1); |
| 842 | |
| 843 | rio_mport_write_config_32(mport, destid, hopcount, |
| 844 | rdev->phys_efptr + |
| 845 | RIO_PORT_N_ACK_STS_CSR(portnum), |
| 846 | RIO_PORT_N_ACK_CLEAR); |
| 847 | |
| 848 | /* Schedule Extraction Service */ |
| 849 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", |
| 850 | rio_name(rdev), portnum); |
| 851 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 852 | } |
| 853 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 854 | rio_mport_read_config_32(mport, destid, hopcount, |
| 855 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
| 856 | if (em_perrdet) { |
| 857 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", |
| 858 | portnum, em_perrdet); |
| 859 | /* Clear EM Port N Error Detect CSR */ |
| 860 | rio_mport_write_config_32(mport, destid, hopcount, |
| 861 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
| 862 | } |
| 863 | |
| 864 | rio_mport_read_config_32(mport, destid, hopcount, |
| 865 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
| 866 | if (em_ltlerrdet) { |
| 867 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", |
| 868 | em_ltlerrdet); |
| 869 | /* Clear EM L/T Layer Error Detect CSR */ |
| 870 | rio_mport_write_config_32(mport, destid, hopcount, |
| 871 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
| 872 | } |
| 873 | |
Alexandre Bounine | 388c45c | 2010-10-27 15:34:35 -0700 | [diff] [blame] | 874 | /* Clear remaining error bits and Port-Write Pending bit */ |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 875 | rio_mport_write_config_32(mport, destid, hopcount, |
| 876 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
Alexandre Bounine | 388c45c | 2010-10-27 15:34:35 -0700 | [diff] [blame] | 877 | err_status); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 878 | |
| 879 | return 0; |
| 880 | } |
| 881 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); |
| 882 | |
| 883 | /** |
| 884 | * rio_mport_get_efb - get pointer to next extended features block |
| 885 | * @port: Master port to issue transaction |
| 886 | * @local: Indicate a local master port or remote device access |
| 887 | * @destid: Destination ID of the device |
| 888 | * @hopcount: Number of switch hops to the device |
| 889 | * @from: Offset of current Extended Feature block header (if 0 starts |
| 890 | * from ExtFeaturePtr) |
| 891 | */ |
| 892 | u32 |
| 893 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, |
| 894 | u8 hopcount, u32 from) |
| 895 | { |
| 896 | u32 reg_val; |
| 897 | |
| 898 | if (from == 0) { |
| 899 | if (local) |
| 900 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, |
| 901 | ®_val); |
| 902 | else |
| 903 | rio_mport_read_config_32(port, destid, hopcount, |
| 904 | RIO_ASM_INFO_CAR, ®_val); |
| 905 | return reg_val & RIO_EXT_FTR_PTR_MASK; |
| 906 | } else { |
| 907 | if (local) |
| 908 | rio_local_read_config_32(port, from, ®_val); |
| 909 | else |
| 910 | rio_mport_read_config_32(port, destid, hopcount, |
| 911 | from, ®_val); |
| 912 | return RIO_GET_BLOCK_ID(reg_val); |
| 913 | } |
| 914 | } |
| 915 | |
| 916 | /** |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 917 | * rio_mport_get_feature - query for devices' extended features |
| 918 | * @port: Master port to issue transaction |
| 919 | * @local: Indicate a local master port or remote device access |
| 920 | * @destid: Destination ID of the device |
| 921 | * @hopcount: Number of switch hops to the device |
| 922 | * @ftr: Extended feature code |
| 923 | * |
| 924 | * Tell if a device supports a given RapidIO capability. |
| 925 | * Returns the offset of the requested extended feature |
| 926 | * block within the device's RIO configuration space or |
| 927 | * 0 in case the device does not support it. Possible |
| 928 | * values for @ftr: |
| 929 | * |
| 930 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices |
| 931 | * |
| 932 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices |
| 933 | * |
| 934 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices |
| 935 | * |
| 936 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices |
| 937 | * |
| 938 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices |
| 939 | * |
| 940 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices |
| 941 | */ |
| 942 | u32 |
| 943 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, |
| 944 | u8 hopcount, int ftr) |
| 945 | { |
| 946 | u32 asm_info, ext_ftr_ptr, ftr_header; |
| 947 | |
| 948 | if (local) |
| 949 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); |
| 950 | else |
| 951 | rio_mport_read_config_32(port, destid, hopcount, |
| 952 | RIO_ASM_INFO_CAR, &asm_info); |
| 953 | |
| 954 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; |
| 955 | |
| 956 | while (ext_ftr_ptr) { |
| 957 | if (local) |
| 958 | rio_local_read_config_32(port, ext_ftr_ptr, |
| 959 | &ftr_header); |
| 960 | else |
| 961 | rio_mport_read_config_32(port, destid, hopcount, |
| 962 | ext_ftr_ptr, &ftr_header); |
| 963 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) |
| 964 | return ext_ftr_ptr; |
| 965 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) |
| 966 | break; |
| 967 | } |
| 968 | |
| 969 | return 0; |
| 970 | } |
| 971 | |
| 972 | /** |
| 973 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did |
| 974 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids |
| 975 | * @did: RIO did to match or %RIO_ANY_ID to match all dids |
| 976 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids |
| 977 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids |
| 978 | * @from: Previous RIO device found in search, or %NULL for new search |
| 979 | * |
| 980 | * Iterates through the list of known RIO devices. If a RIO device is |
| 981 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference |
| 982 | * count to the device is incrememted and a pointer to its device |
| 983 | * structure is returned. Otherwise, %NULL is returned. A new search |
| 984 | * is initiated by passing %NULL to the @from argument. Otherwise, if |
| 985 | * @from is not %NULL, searches continue from next device on the global |
| 986 | * list. The reference count for @from is always decremented if it is |
| 987 | * not %NULL. |
| 988 | */ |
| 989 | struct rio_dev *rio_get_asm(u16 vid, u16 did, |
| 990 | u16 asm_vid, u16 asm_did, struct rio_dev *from) |
| 991 | { |
| 992 | struct list_head *n; |
| 993 | struct rio_dev *rdev; |
| 994 | |
| 995 | WARN_ON(in_interrupt()); |
| 996 | spin_lock(&rio_global_list_lock); |
| 997 | n = from ? from->global_list.next : rio_devices.next; |
| 998 | |
| 999 | while (n && (n != &rio_devices)) { |
| 1000 | rdev = rio_dev_g(n); |
| 1001 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && |
| 1002 | (did == RIO_ANY_ID || rdev->did == did) && |
| 1003 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && |
| 1004 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) |
| 1005 | goto exit; |
| 1006 | n = n->next; |
| 1007 | } |
| 1008 | rdev = NULL; |
| 1009 | exit: |
| 1010 | rio_dev_put(from); |
| 1011 | rdev = rio_dev_get(rdev); |
| 1012 | spin_unlock(&rio_global_list_lock); |
| 1013 | return rdev; |
| 1014 | } |
| 1015 | |
| 1016 | /** |
| 1017 | * rio_get_device - Begin or continue searching for a RIO device by vid/did |
| 1018 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids |
| 1019 | * @did: RIO did to match or %RIO_ANY_ID to match all dids |
| 1020 | * @from: Previous RIO device found in search, or %NULL for new search |
| 1021 | * |
| 1022 | * Iterates through the list of known RIO devices. If a RIO device is |
| 1023 | * found with a matching @vid and @did, the reference count to the |
| 1024 | * device is incrememted and a pointer to its device structure is returned. |
| 1025 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL |
| 1026 | * to the @from argument. Otherwise, if @from is not %NULL, searches |
| 1027 | * continue from next device on the global list. The reference count for |
| 1028 | * @from is always decremented if it is not %NULL. |
| 1029 | */ |
| 1030 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) |
| 1031 | { |
| 1032 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); |
| 1033 | } |
| 1034 | |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1035 | /** |
| 1036 | * rio_std_route_add_entry - Add switch route table entry using standard |
| 1037 | * registers defined in RIO specification rev.1.3 |
| 1038 | * @mport: Master port to issue transaction |
| 1039 | * @destid: Destination ID of the device |
| 1040 | * @hopcount: Number of switch hops to the device |
| 1041 | * @table: routing table ID (global or port-specific) |
| 1042 | * @route_destid: destID entry in the RT |
| 1043 | * @route_port: destination port for specified destID |
| 1044 | */ |
| 1045 | int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, |
| 1046 | u16 table, u16 route_destid, u8 route_port) |
| 1047 | { |
| 1048 | if (table == RIO_GLOBAL_TABLE) { |
| 1049 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1050 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, |
| 1051 | (u32)route_destid); |
| 1052 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1053 | RIO_STD_RTE_CONF_PORT_SEL_CSR, |
| 1054 | (u32)route_port); |
| 1055 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 1056 | |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1057 | udelay(10); |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | /** |
| 1062 | * rio_std_route_get_entry - Read switch route table entry (port number) |
Uwe Kleine-König | 638c594 | 2010-06-11 12:16:58 +0200 | [diff] [blame] | 1063 | * associated with specified destID using standard registers defined in RIO |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1064 | * specification rev.1.3 |
| 1065 | * @mport: Master port to issue transaction |
| 1066 | * @destid: Destination ID of the device |
| 1067 | * @hopcount: Number of switch hops to the device |
| 1068 | * @table: routing table ID (global or port-specific) |
| 1069 | * @route_destid: destID entry in the RT |
| 1070 | * @route_port: returned destination port for specified destID |
| 1071 | */ |
| 1072 | int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, |
| 1073 | u16 table, u16 route_destid, u8 *route_port) |
| 1074 | { |
| 1075 | u32 result; |
| 1076 | |
| 1077 | if (table == RIO_GLOBAL_TABLE) { |
| 1078 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1079 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); |
| 1080 | rio_mport_read_config_32(mport, destid, hopcount, |
| 1081 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); |
| 1082 | |
| 1083 | *route_port = (u8)result; |
| 1084 | } |
| 1085 | |
| 1086 | return 0; |
| 1087 | } |
| 1088 | |
| 1089 | /** |
| 1090 | * rio_std_route_clr_table - Clear swotch route table using standard registers |
| 1091 | * defined in RIO specification rev.1.3. |
| 1092 | * @mport: Master port to issue transaction |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1093 | * @destid: Destination ID of the device |
| 1094 | * @hopcount: Number of switch hops to the device |
| 1095 | * @table: routing table ID (global or port-specific) |
| 1096 | */ |
| 1097 | int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, |
| 1098 | u16 table) |
| 1099 | { |
| 1100 | u32 max_destid = 0xff; |
| 1101 | u32 i, pef, id_inc = 1, ext_cfg = 0; |
| 1102 | u32 port_sel = RIO_INVALID_ROUTE; |
| 1103 | |
| 1104 | if (table == RIO_GLOBAL_TABLE) { |
| 1105 | rio_mport_read_config_32(mport, destid, hopcount, |
| 1106 | RIO_PEF_CAR, &pef); |
| 1107 | |
| 1108 | if (mport->sys_size) { |
| 1109 | rio_mport_read_config_32(mport, destid, hopcount, |
| 1110 | RIO_SWITCH_RT_LIMIT, |
| 1111 | &max_destid); |
| 1112 | max_destid &= RIO_RT_MAX_DESTID; |
| 1113 | } |
| 1114 | |
| 1115 | if (pef & RIO_PEF_EXT_RT) { |
| 1116 | ext_cfg = 0x80000000; |
| 1117 | id_inc = 4; |
| 1118 | port_sel = (RIO_INVALID_ROUTE << 24) | |
| 1119 | (RIO_INVALID_ROUTE << 16) | |
| 1120 | (RIO_INVALID_ROUTE << 8) | |
| 1121 | RIO_INVALID_ROUTE; |
| 1122 | } |
| 1123 | |
| 1124 | for (i = 0; i <= max_destid;) { |
| 1125 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1126 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, |
| 1127 | ext_cfg | i); |
| 1128 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1129 | RIO_STD_RTE_CONF_PORT_SEL_CSR, |
| 1130 | port_sel); |
| 1131 | i += id_inc; |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | udelay(10); |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1139 | static void rio_fixup_device(struct rio_dev *dev) |
| 1140 | { |
| 1141 | } |
| 1142 | |
| 1143 | static int __devinit rio_init(void) |
| 1144 | { |
| 1145 | struct rio_dev *dev = NULL; |
| 1146 | |
| 1147 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { |
| 1148 | rio_fixup_device(dev); |
| 1149 | } |
| 1150 | return 0; |
| 1151 | } |
| 1152 | |
| 1153 | device_initcall(rio_init); |
| 1154 | |
Al Viro | 37d33d1 | 2008-11-22 17:36:24 +0000 | [diff] [blame] | 1155 | int __devinit rio_init_mports(void) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1156 | { |
| 1157 | int rc = 0; |
| 1158 | struct rio_mport *port; |
| 1159 | |
| 1160 | list_for_each_entry(port, &rio_mports, node) { |
| 1161 | if (!request_mem_region(port->iores.start, |
Dan Carpenter | 88cf81f | 2010-11-11 14:05:07 -0800 | [diff] [blame] | 1162 | resource_size(&port->iores), |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1163 | port->name)) { |
| 1164 | printk(KERN_ERR |
Kumar Gala | 5febf1c | 2008-01-23 05:53:47 -0600 | [diff] [blame] | 1165 | "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", |
Dan Carpenter | 88cf81f | 2010-11-11 14:05:07 -0800 | [diff] [blame] | 1166 | (u64)port->iores.start, (u64)port->iores.end); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1167 | rc = -ENOMEM; |
| 1168 | goto out; |
| 1169 | } |
| 1170 | |
| 1171 | if (port->host_deviceid >= 0) |
| 1172 | rio_enum_mport(port); |
| 1173 | else |
| 1174 | rio_disc_mport(port); |
| 1175 | } |
| 1176 | |
| 1177 | out: |
| 1178 | return rc; |
| 1179 | } |
| 1180 | |
| 1181 | void rio_register_mport(struct rio_mport *port) |
| 1182 | { |
| 1183 | list_add_tail(&port->node, &rio_mports); |
| 1184 | } |
| 1185 | |
| 1186 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); |
| 1187 | EXPORT_SYMBOL_GPL(rio_get_device); |
| 1188 | EXPORT_SYMBOL_GPL(rio_get_asm); |
| 1189 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); |
| 1190 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); |
| 1191 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); |
| 1192 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); |
| 1193 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); |
| 1194 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); |
| 1195 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); |
| 1196 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |