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 | fdf90ab | 2013-07-03 15:08:56 -0700 | [diff] [blame] | 8 | * Copyright 2009 - 2013 Integrated Device Technology, Inc. |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 9 | * Alex Bounine <alexandre.bounine@idt.com> |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 10 | * |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License as published by the |
| 13 | * Free Software Foundation; either version 2 of the License, or (at your |
| 14 | * option) any later version. |
| 15 | */ |
| 16 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | #include <linux/kernel.h> |
| 19 | |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/rio.h> |
| 23 | #include <linux/rio_drv.h> |
| 24 | #include <linux/rio_ids.h> |
| 25 | #include <linux/rio_regs.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/spinlock.h> |
Tim Schmielau | de25968 | 2006-01-08 01:02:05 -0800 | [diff] [blame] | 28 | #include <linux/slab.h> |
Kumar Gala | 5febf1c | 2008-01-23 05:53:47 -0600 | [diff] [blame] | 29 | #include <linux/interrupt.h> |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 30 | |
| 31 | #include "rio.h" |
| 32 | |
Alexandre Bounine | fdf90ab | 2013-07-03 15:08:56 -0700 | [diff] [blame] | 33 | MODULE_DESCRIPTION("RapidIO Subsystem Core"); |
| 34 | MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); |
| 35 | MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>"); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
| 38 | static int hdid[RIO_MAX_MPORTS]; |
| 39 | static int ids_num; |
| 40 | module_param_array(hdid, int, &ids_num, 0); |
| 41 | MODULE_PARM_DESC(hdid, |
| 42 | "Destination ID assignment to local RapidIO controllers"); |
| 43 | |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 44 | static LIST_HEAD(rio_devices); |
| 45 | static DEFINE_SPINLOCK(rio_global_list_lock); |
| 46 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 47 | static LIST_HEAD(rio_mports); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 48 | static LIST_HEAD(rio_scans); |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 49 | static DEFINE_MUTEX(rio_mport_list_lock); |
Alexandre Bounine | 569fccb | 2011-03-23 16:43:05 -0700 | [diff] [blame] | 50 | static unsigned char next_portid; |
Alexandre Bounine | da1589f | 2012-10-04 17:15:57 -0700 | [diff] [blame] | 51 | static DEFINE_SPINLOCK(rio_mmap_lock); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 52 | |
| 53 | /** |
| 54 | * rio_local_get_device_id - Get the base/extended device id for a port |
| 55 | * @port: RIO master port from which to get the deviceid |
| 56 | * |
| 57 | * Reads the base/extended device id from the local device |
| 58 | * implementing the master port. Returns the 8/16-bit device |
| 59 | * id. |
| 60 | */ |
| 61 | u16 rio_local_get_device_id(struct rio_mport *port) |
| 62 | { |
| 63 | u32 result; |
| 64 | |
| 65 | rio_local_read_config_32(port, RIO_DID_CSR, &result); |
| 66 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 67 | return (RIO_GET_DID(port->sys_size, result)); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | /** |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 71 | * rio_add_device- Adds a RIO device to the device model |
| 72 | * @rdev: RIO device |
| 73 | * |
| 74 | * Adds the RIO device to the global device list and adds the RIO |
| 75 | * device to the RIO device list. Creates the generic sysfs nodes |
| 76 | * for an RIO device. |
| 77 | */ |
| 78 | int rio_add_device(struct rio_dev *rdev) |
| 79 | { |
| 80 | int err; |
| 81 | |
| 82 | err = device_add(&rdev->dev); |
| 83 | if (err) |
| 84 | return err; |
| 85 | |
| 86 | spin_lock(&rio_global_list_lock); |
| 87 | list_add_tail(&rdev->global_list, &rio_devices); |
| 88 | spin_unlock(&rio_global_list_lock); |
| 89 | |
| 90 | rio_create_sysfs_dev_files(rdev); |
| 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | EXPORT_SYMBOL_GPL(rio_add_device); |
| 95 | |
| 96 | /** |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 97 | * rio_request_inb_mbox - request inbound mailbox service |
| 98 | * @mport: RIO master port from which to allocate the mailbox resource |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 99 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 100 | * @mbox: Mailbox number to claim |
| 101 | * @entries: Number of entries in inbound mailbox queue |
| 102 | * @minb: Callback to execute when inbound message is received |
| 103 | * |
| 104 | * Requests ownership of an inbound mailbox resource and binds |
| 105 | * a callback function to the resource. Returns %0 on success. |
| 106 | */ |
| 107 | int rio_request_inb_mbox(struct rio_mport *mport, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 108 | void *dev_id, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 109 | int mbox, |
| 110 | int entries, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 111 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 112 | int slot)) |
| 113 | { |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 114 | int rc = -ENOSYS; |
| 115 | struct resource *res; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 116 | |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 117 | if (mport->ops->open_inb_mbox == NULL) |
| 118 | goto out; |
| 119 | |
| 120 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 121 | |
| 122 | if (res) { |
| 123 | rio_init_mbox_res(res, mbox, mbox); |
| 124 | |
| 125 | /* Make sure this mailbox isn't in use */ |
| 126 | if ((rc = |
| 127 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], |
| 128 | res)) < 0) { |
| 129 | kfree(res); |
| 130 | goto out; |
| 131 | } |
| 132 | |
| 133 | mport->inb_msg[mbox].res = res; |
| 134 | |
| 135 | /* Hook the inbound message callback */ |
| 136 | mport->inb_msg[mbox].mcback = minb; |
| 137 | |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 138 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 139 | } else |
| 140 | rc = -ENOMEM; |
| 141 | |
| 142 | out: |
| 143 | return rc; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * rio_release_inb_mbox - release inbound mailbox message service |
| 148 | * @mport: RIO master port from which to release the mailbox resource |
| 149 | * @mbox: Mailbox number to release |
| 150 | * |
| 151 | * Releases ownership of an inbound mailbox resource. Returns 0 |
| 152 | * if the request has been satisfied. |
| 153 | */ |
| 154 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) |
| 155 | { |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 156 | if (mport->ops->close_inb_mbox) { |
| 157 | mport->ops->close_inb_mbox(mport, mbox); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 158 | |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 159 | /* Release the mailbox resource */ |
| 160 | return release_resource(mport->inb_msg[mbox].res); |
| 161 | } else |
| 162 | return -ENOSYS; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | /** |
| 166 | * rio_request_outb_mbox - request outbound mailbox service |
| 167 | * @mport: RIO master port from which to allocate the mailbox resource |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 168 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 169 | * @mbox: Mailbox number to claim |
| 170 | * @entries: Number of entries in outbound mailbox queue |
| 171 | * @moutb: Callback to execute when outbound message is sent |
| 172 | * |
| 173 | * Requests ownership of an outbound mailbox resource and binds |
| 174 | * a callback function to the resource. Returns 0 on success. |
| 175 | */ |
| 176 | int rio_request_outb_mbox(struct rio_mport *mport, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 177 | void *dev_id, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 178 | int mbox, |
| 179 | int entries, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 180 | 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] | 181 | { |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 182 | int rc = -ENOSYS; |
| 183 | struct resource *res; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 184 | |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 185 | if (mport->ops->open_outb_mbox == NULL) |
| 186 | goto out; |
| 187 | |
| 188 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 189 | |
| 190 | if (res) { |
| 191 | rio_init_mbox_res(res, mbox, mbox); |
| 192 | |
| 193 | /* Make sure this outbound mailbox isn't in use */ |
| 194 | if ((rc = |
| 195 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], |
| 196 | res)) < 0) { |
| 197 | kfree(res); |
| 198 | goto out; |
| 199 | } |
| 200 | |
| 201 | mport->outb_msg[mbox].res = res; |
| 202 | |
| 203 | /* Hook the inbound message callback */ |
| 204 | mport->outb_msg[mbox].mcback = moutb; |
| 205 | |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 206 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 207 | } else |
| 208 | rc = -ENOMEM; |
| 209 | |
| 210 | out: |
| 211 | return rc; |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * rio_release_outb_mbox - release outbound mailbox message service |
| 216 | * @mport: RIO master port from which to release the mailbox resource |
| 217 | * @mbox: Mailbox number to release |
| 218 | * |
| 219 | * Releases ownership of an inbound mailbox resource. Returns 0 |
| 220 | * if the request has been satisfied. |
| 221 | */ |
| 222 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) |
| 223 | { |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 224 | if (mport->ops->close_outb_mbox) { |
| 225 | mport->ops->close_outb_mbox(mport, mbox); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 226 | |
Alexandre Bounine | f8f0626 | 2011-03-23 16:43:02 -0700 | [diff] [blame] | 227 | /* Release the mailbox resource */ |
| 228 | return release_resource(mport->outb_msg[mbox].res); |
| 229 | } else |
| 230 | return -ENOSYS; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | /** |
| 234 | * rio_setup_inb_dbell - bind inbound doorbell callback |
| 235 | * @mport: RIO master port to bind the doorbell callback |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 236 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 237 | * @res: Doorbell message resource |
| 238 | * @dinb: Callback to execute when doorbell is received |
| 239 | * |
| 240 | * Adds a doorbell resource/callback pair into a port's |
| 241 | * doorbell event list. Returns 0 if the request has been |
| 242 | * satisfied. |
| 243 | */ |
| 244 | static int |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 245 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
| 246 | 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] | 247 | u16 info)) |
| 248 | { |
| 249 | int rc = 0; |
| 250 | struct rio_dbell *dbell; |
| 251 | |
| 252 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { |
| 253 | rc = -ENOMEM; |
| 254 | goto out; |
| 255 | } |
| 256 | |
| 257 | dbell->res = res; |
| 258 | dbell->dinb = dinb; |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 259 | dbell->dev_id = dev_id; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 260 | |
| 261 | list_add_tail(&dbell->node, &mport->dbells); |
| 262 | |
| 263 | out: |
| 264 | return rc; |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * rio_request_inb_dbell - request inbound doorbell message service |
| 269 | * @mport: RIO master port from which to allocate the doorbell resource |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 270 | * @dev_id: Device specific pointer to pass on event |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 271 | * @start: Doorbell info range start |
| 272 | * @end: Doorbell info range end |
| 273 | * @dinb: Callback to execute when doorbell is received |
| 274 | * |
| 275 | * Requests ownership of an inbound doorbell resource and binds |
| 276 | * a callback function to the resource. Returns 0 if the request |
| 277 | * has been satisfied. |
| 278 | */ |
| 279 | int rio_request_inb_dbell(struct rio_mport *mport, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 280 | void *dev_id, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 281 | u16 start, |
| 282 | u16 end, |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 283 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 284 | u16 dst, u16 info)) |
| 285 | { |
| 286 | int rc = 0; |
| 287 | |
| 288 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
| 289 | |
| 290 | if (res) { |
| 291 | rio_init_dbell_res(res, start, end); |
| 292 | |
| 293 | /* Make sure these doorbells aren't in use */ |
| 294 | if ((rc = |
| 295 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], |
| 296 | res)) < 0) { |
| 297 | kfree(res); |
| 298 | goto out; |
| 299 | } |
| 300 | |
| 301 | /* Hook the doorbell callback */ |
Matt Porter | 6978bbc | 2005-11-07 01:00:20 -0800 | [diff] [blame] | 302 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 303 | } else |
| 304 | rc = -ENOMEM; |
| 305 | |
| 306 | out: |
| 307 | return rc; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * rio_release_inb_dbell - release inbound doorbell message service |
| 312 | * @mport: RIO master port from which to release the doorbell resource |
| 313 | * @start: Doorbell info range start |
| 314 | * @end: Doorbell info range end |
| 315 | * |
| 316 | * Releases ownership of an inbound doorbell resource and removes |
| 317 | * callback from the doorbell event list. Returns 0 if the request |
| 318 | * has been satisfied. |
| 319 | */ |
| 320 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) |
| 321 | { |
| 322 | int rc = 0, found = 0; |
| 323 | struct rio_dbell *dbell; |
| 324 | |
| 325 | list_for_each_entry(dbell, &mport->dbells, node) { |
| 326 | if ((dbell->res->start == start) && (dbell->res->end == end)) { |
| 327 | found = 1; |
| 328 | break; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /* If we can't find an exact match, fail */ |
| 333 | if (!found) { |
| 334 | rc = -EINVAL; |
| 335 | goto out; |
| 336 | } |
| 337 | |
| 338 | /* Delete from list */ |
| 339 | list_del(&dbell->node); |
| 340 | |
| 341 | /* Release the doorbell resource */ |
| 342 | rc = release_resource(dbell->res); |
| 343 | |
| 344 | /* Free the doorbell event */ |
| 345 | kfree(dbell); |
| 346 | |
| 347 | out: |
| 348 | return rc; |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * rio_request_outb_dbell - request outbound doorbell message range |
| 353 | * @rdev: RIO device from which to allocate the doorbell resource |
| 354 | * @start: Doorbell message range start |
| 355 | * @end: Doorbell message range end |
| 356 | * |
| 357 | * Requests ownership of a doorbell message range. Returns a resource |
| 358 | * if the request has been satisfied or %NULL on failure. |
| 359 | */ |
| 360 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, |
| 361 | u16 end) |
| 362 | { |
| 363 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); |
| 364 | |
| 365 | if (res) { |
| 366 | rio_init_dbell_res(res, start, end); |
| 367 | |
| 368 | /* Make sure these doorbells aren't in use */ |
| 369 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) |
| 370 | < 0) { |
| 371 | kfree(res); |
| 372 | res = NULL; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | return res; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * rio_release_outb_dbell - release outbound doorbell message range |
| 381 | * @rdev: RIO device from which to release the doorbell resource |
| 382 | * @res: Doorbell resource to be freed |
| 383 | * |
| 384 | * Releases ownership of a doorbell message range. Returns 0 if the |
| 385 | * request has been satisfied. |
| 386 | */ |
| 387 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) |
| 388 | { |
| 389 | int rc = release_resource(res); |
| 390 | |
| 391 | kfree(res); |
| 392 | |
| 393 | return rc; |
| 394 | } |
| 395 | |
| 396 | /** |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 397 | * rio_request_inb_pwrite - request inbound port-write message service |
Randy Dunlap | 97ef6f7 | 2010-05-28 15:08:08 -0700 | [diff] [blame] | 398 | * @rdev: RIO device to which register inbound port-write callback routine |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 399 | * @pwcback: Callback routine to execute when port-write is received |
| 400 | * |
| 401 | * Binds a port-write callback function to the RapidIO device. |
| 402 | * Returns 0 if the request has been satisfied. |
| 403 | */ |
| 404 | int rio_request_inb_pwrite(struct rio_dev *rdev, |
| 405 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) |
| 406 | { |
| 407 | int rc = 0; |
| 408 | |
| 409 | spin_lock(&rio_global_list_lock); |
| 410 | if (rdev->pwcback != NULL) |
| 411 | rc = -ENOMEM; |
| 412 | else |
| 413 | rdev->pwcback = pwcback; |
| 414 | |
| 415 | spin_unlock(&rio_global_list_lock); |
| 416 | return rc; |
| 417 | } |
| 418 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); |
| 419 | |
| 420 | /** |
| 421 | * rio_release_inb_pwrite - release inbound port-write message service |
| 422 | * @rdev: RIO device which registered for inbound port-write callback |
| 423 | * |
| 424 | * Removes callback from the rio_dev structure. Returns 0 if the request |
| 425 | * has been satisfied. |
| 426 | */ |
| 427 | int rio_release_inb_pwrite(struct rio_dev *rdev) |
| 428 | { |
| 429 | int rc = -ENOMEM; |
| 430 | |
| 431 | spin_lock(&rio_global_list_lock); |
| 432 | if (rdev->pwcback) { |
| 433 | rdev->pwcback = NULL; |
| 434 | rc = 0; |
| 435 | } |
| 436 | |
| 437 | spin_unlock(&rio_global_list_lock); |
| 438 | return rc; |
| 439 | } |
| 440 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); |
| 441 | |
| 442 | /** |
Alexandre Bounine | da1589f | 2012-10-04 17:15:57 -0700 | [diff] [blame] | 443 | * rio_map_inb_region -- Map inbound memory region. |
| 444 | * @mport: Master port. |
Randy Dunlap | 2ca3cb5 | 2012-11-16 14:14:56 -0800 | [diff] [blame] | 445 | * @local: physical address of memory region to be mapped |
Alexandre Bounine | da1589f | 2012-10-04 17:15:57 -0700 | [diff] [blame] | 446 | * @rbase: RIO base address assigned to this window |
| 447 | * @size: Size of the memory region |
| 448 | * @rflags: Flags for mapping. |
| 449 | * |
| 450 | * Return: 0 -- Success. |
| 451 | * |
| 452 | * This function will create the mapping from RIO space to local memory. |
| 453 | */ |
| 454 | int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, |
| 455 | u64 rbase, u32 size, u32 rflags) |
| 456 | { |
| 457 | int rc = 0; |
| 458 | unsigned long flags; |
| 459 | |
| 460 | if (!mport->ops->map_inb) |
| 461 | return -1; |
| 462 | spin_lock_irqsave(&rio_mmap_lock, flags); |
| 463 | rc = mport->ops->map_inb(mport, local, rbase, size, rflags); |
| 464 | spin_unlock_irqrestore(&rio_mmap_lock, flags); |
| 465 | return rc; |
| 466 | } |
| 467 | EXPORT_SYMBOL_GPL(rio_map_inb_region); |
| 468 | |
| 469 | /** |
| 470 | * rio_unmap_inb_region -- Unmap the inbound memory region |
| 471 | * @mport: Master port |
| 472 | * @lstart: physical address of memory region to be unmapped |
| 473 | */ |
| 474 | void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) |
| 475 | { |
| 476 | unsigned long flags; |
| 477 | if (!mport->ops->unmap_inb) |
| 478 | return; |
| 479 | spin_lock_irqsave(&rio_mmap_lock, flags); |
| 480 | mport->ops->unmap_inb(mport, lstart); |
| 481 | spin_unlock_irqrestore(&rio_mmap_lock, flags); |
| 482 | } |
| 483 | EXPORT_SYMBOL_GPL(rio_unmap_inb_region); |
| 484 | |
| 485 | /** |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 486 | * rio_mport_get_physefb - Helper function that returns register offset |
| 487 | * for Physical Layer Extended Features Block. |
Randy Dunlap | 97ef6f7 | 2010-05-28 15:08:08 -0700 | [diff] [blame] | 488 | * @port: Master port to issue transaction |
| 489 | * @local: Indicate a local master port or remote device access |
| 490 | * @destid: Destination ID of the device |
| 491 | * @hopcount: Number of switch hops to the device |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 492 | */ |
| 493 | u32 |
| 494 | rio_mport_get_physefb(struct rio_mport *port, int local, |
| 495 | u16 destid, u8 hopcount) |
| 496 | { |
| 497 | u32 ext_ftr_ptr; |
| 498 | u32 ftr_header; |
| 499 | |
| 500 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); |
| 501 | |
| 502 | while (ext_ftr_ptr) { |
| 503 | if (local) |
| 504 | rio_local_read_config_32(port, ext_ftr_ptr, |
| 505 | &ftr_header); |
| 506 | else |
| 507 | rio_mport_read_config_32(port, destid, hopcount, |
| 508 | ext_ftr_ptr, &ftr_header); |
| 509 | |
| 510 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); |
| 511 | switch (ftr_header) { |
| 512 | |
| 513 | case RIO_EFB_SER_EP_ID_V13P: |
| 514 | case RIO_EFB_SER_EP_REC_ID_V13P: |
| 515 | case RIO_EFB_SER_EP_FREE_ID_V13P: |
| 516 | case RIO_EFB_SER_EP_ID: |
| 517 | case RIO_EFB_SER_EP_REC_ID: |
| 518 | case RIO_EFB_SER_EP_FREE_ID: |
| 519 | case RIO_EFB_SER_EP_FREC_ID: |
| 520 | |
| 521 | return ext_ftr_ptr; |
| 522 | |
| 523 | default: |
| 524 | break; |
| 525 | } |
| 526 | |
| 527 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, |
| 528 | hopcount, ext_ftr_ptr); |
| 529 | } |
| 530 | |
| 531 | return ext_ftr_ptr; |
| 532 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 533 | EXPORT_SYMBOL_GPL(rio_mport_get_physefb); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 534 | |
| 535 | /** |
| 536 | * 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] | 537 | * @comp_tag: RIO component tag to match |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 538 | * @from: Previous RIO device found in search, or %NULL for new search |
| 539 | * |
| 540 | * Iterates through the list of known RIO devices. If a RIO device is |
| 541 | * found with a matching @comp_tag, a pointer to its device |
| 542 | * structure is returned. Otherwise, %NULL is returned. A new search |
| 543 | * is initiated by passing %NULL to the @from argument. Otherwise, if |
| 544 | * @from is not %NULL, searches continue from next device on the global |
| 545 | * list. |
| 546 | */ |
Alexandre Bounine | af84ca38 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 547 | 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] | 548 | { |
| 549 | struct list_head *n; |
| 550 | struct rio_dev *rdev; |
| 551 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 552 | spin_lock(&rio_global_list_lock); |
| 553 | n = from ? from->global_list.next : rio_devices.next; |
| 554 | |
| 555 | while (n && (n != &rio_devices)) { |
| 556 | rdev = rio_dev_g(n); |
| 557 | if (rdev->comp_tag == comp_tag) |
| 558 | goto exit; |
| 559 | n = n->next; |
| 560 | } |
| 561 | rdev = NULL; |
| 562 | exit: |
| 563 | spin_unlock(&rio_global_list_lock); |
| 564 | return rdev; |
| 565 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 566 | EXPORT_SYMBOL_GPL(rio_get_comptag); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 567 | |
| 568 | /** |
| 569 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. |
| 570 | * @rdev: Pointer to RIO device control structure |
| 571 | * @pnum: Switch port number to set LOCKOUT bit |
| 572 | * @lock: Operation : set (=1) or clear (=0) |
| 573 | */ |
| 574 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) |
| 575 | { |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 576 | u32 regval; |
| 577 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 578 | rio_read_config_32(rdev, |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 579 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
| 580 | ®val); |
| 581 | if (lock) |
| 582 | regval |= RIO_PORT_N_CTL_LOCKOUT; |
| 583 | else |
| 584 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; |
| 585 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 586 | rio_write_config_32(rdev, |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 587 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
| 588 | regval); |
| 589 | return 0; |
| 590 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 591 | EXPORT_SYMBOL_GPL(rio_set_port_lockout); |
| 592 | |
| 593 | /** |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 594 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of |
| 595 | * given port |
| 596 | * @port: Master port associated with the RIO network |
| 597 | * @local: local=1 select local port otherwise a far device is reached |
| 598 | * @destid: Destination ID of the device to check host bit |
| 599 | * @hopcount: Number of hops to reach the target |
| 600 | * @port_num: Port (-number on switch) to enable on a far end device |
| 601 | * |
| 602 | * Returns 0 or 1 from on General Control Command and Status Register |
| 603 | * (EXT_PTR+0x3C) |
| 604 | */ |
| 605 | int rio_enable_rx_tx_port(struct rio_mport *port, |
| 606 | int local, u16 destid, |
| 607 | u8 hopcount, u8 port_num) |
| 608 | { |
| 609 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS |
| 610 | u32 regval; |
| 611 | u32 ext_ftr_ptr; |
| 612 | |
| 613 | /* |
| 614 | * enable rx input tx output port |
| 615 | */ |
| 616 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " |
| 617 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); |
| 618 | |
| 619 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); |
| 620 | |
| 621 | if (local) { |
| 622 | rio_local_read_config_32(port, ext_ftr_ptr + |
| 623 | RIO_PORT_N_CTL_CSR(0), |
| 624 | ®val); |
| 625 | } else { |
| 626 | if (rio_mport_read_config_32(port, destid, hopcount, |
| 627 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) |
| 628 | return -EIO; |
| 629 | } |
| 630 | |
| 631 | if (regval & RIO_PORT_N_CTL_P_TYP_SER) { |
| 632 | /* serial */ |
| 633 | regval = regval | RIO_PORT_N_CTL_EN_RX_SER |
| 634 | | RIO_PORT_N_CTL_EN_TX_SER; |
| 635 | } else { |
| 636 | /* parallel */ |
| 637 | regval = regval | RIO_PORT_N_CTL_EN_RX_PAR |
| 638 | | RIO_PORT_N_CTL_EN_TX_PAR; |
| 639 | } |
| 640 | |
| 641 | if (local) { |
| 642 | rio_local_write_config_32(port, ext_ftr_ptr + |
| 643 | RIO_PORT_N_CTL_CSR(0), regval); |
| 644 | } else { |
| 645 | if (rio_mport_write_config_32(port, destid, hopcount, |
| 646 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) |
| 647 | return -EIO; |
| 648 | } |
| 649 | #endif |
| 650 | return 0; |
| 651 | } |
| 652 | EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); |
| 653 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 654 | |
| 655 | /** |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 656 | * rio_chk_dev_route - Validate route to the specified device. |
| 657 | * @rdev: RIO device failed to respond |
| 658 | * @nrdev: Last active device on the route to rdev |
| 659 | * @npnum: nrdev's port number on the route to rdev |
| 660 | * |
| 661 | * Follows a route to the specified RIO device to determine the last available |
| 662 | * device (and corresponding RIO port) on the route. |
| 663 | */ |
| 664 | static int |
| 665 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) |
| 666 | { |
| 667 | u32 result; |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 668 | int p_port, rc = -EIO; |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 669 | struct rio_dev *prev = NULL; |
| 670 | |
| 671 | /* Find switch with failed RIO link */ |
| 672 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { |
| 673 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { |
| 674 | prev = rdev->prev; |
| 675 | break; |
| 676 | } |
| 677 | rdev = rdev->prev; |
| 678 | } |
| 679 | |
| 680 | if (prev == NULL) |
| 681 | goto err_out; |
| 682 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 683 | p_port = prev->rswitch->route_table[rdev->destid]; |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 684 | |
Alexandre Bounine | af84ca38 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 685 | if (p_port != RIO_INVALID_ROUTE) { |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 686 | pr_debug("RIO: link failed on [%s]-P%d\n", |
| 687 | rio_name(prev), p_port); |
| 688 | *nrdev = prev; |
| 689 | *npnum = p_port; |
| 690 | rc = 0; |
| 691 | } else |
Alexandre Bounine | af84ca38 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 692 | 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] | 693 | err_out: |
| 694 | return rc; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * rio_mport_chk_dev_access - Validate access to the specified device. |
| 699 | * @mport: Master port to send transactions |
| 700 | * @destid: Device destination ID in network |
| 701 | * @hopcount: Number of hops into the network |
| 702 | */ |
Alexandre Bounine | e274e0e | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 703 | int |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 704 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
| 705 | { |
| 706 | int i = 0; |
| 707 | u32 tmp; |
| 708 | |
| 709 | while (rio_mport_read_config_32(mport, destid, hopcount, |
| 710 | RIO_DEV_ID_CAR, &tmp)) { |
| 711 | i++; |
| 712 | if (i == RIO_MAX_CHK_RETRY) |
| 713 | return -EIO; |
| 714 | mdelay(1); |
| 715 | } |
| 716 | |
| 717 | return 0; |
| 718 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 719 | EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 720 | |
| 721 | /** |
| 722 | * rio_chk_dev_access - Validate access to the specified device. |
| 723 | * @rdev: Pointer to RIO device control structure |
| 724 | */ |
| 725 | static int rio_chk_dev_access(struct rio_dev *rdev) |
| 726 | { |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 727 | return rio_mport_chk_dev_access(rdev->net->hport, |
| 728 | rdev->destid, rdev->hopcount); |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | /** |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 732 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and |
| 733 | * returns link-response (if requested). |
| 734 | * @rdev: RIO devive to issue Input-status command |
| 735 | * @pnum: Device port number to issue the command |
| 736 | * @lnkresp: Response from a link partner |
| 737 | */ |
| 738 | static int |
| 739 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) |
| 740 | { |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 741 | u32 regval; |
| 742 | int checkcount; |
| 743 | |
| 744 | if (lnkresp) { |
| 745 | /* Read from link maintenance response register |
| 746 | * to clear valid bit */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 747 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 748 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
| 749 | ®val); |
| 750 | udelay(50); |
| 751 | } |
| 752 | |
| 753 | /* Issue Input-status command */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 754 | rio_write_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 755 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
| 756 | RIO_MNT_REQ_CMD_IS); |
| 757 | |
| 758 | /* Exit if the response is not expected */ |
| 759 | if (lnkresp == NULL) |
| 760 | return 0; |
| 761 | |
| 762 | checkcount = 3; |
| 763 | while (checkcount--) { |
| 764 | udelay(50); |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 765 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 766 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
| 767 | ®val); |
| 768 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { |
| 769 | *lnkresp = regval; |
| 770 | return 0; |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | return -EIO; |
| 775 | } |
| 776 | |
| 777 | /** |
| 778 | * rio_clr_err_stopped - Clears port Error-stopped states. |
| 779 | * @rdev: Pointer to RIO device control structure |
| 780 | * @pnum: Switch port number to clear errors |
| 781 | * @err_status: port error status (if 0 reads register from device) |
| 782 | */ |
| 783 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) |
| 784 | { |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 785 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
| 786 | u32 regval; |
| 787 | u32 far_ackid, far_linkstat, near_ackid; |
| 788 | |
| 789 | if (err_status == 0) |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 790 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 791 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
| 792 | &err_status); |
| 793 | |
| 794 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { |
| 795 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); |
| 796 | /* |
| 797 | * Send a Link-Request/Input-Status control symbol |
| 798 | */ |
| 799 | if (rio_get_input_status(rdev, pnum, ®val)) { |
| 800 | pr_debug("RIO_EM: Input-status response timeout\n"); |
| 801 | goto rd_err; |
| 802 | } |
| 803 | |
| 804 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", |
| 805 | pnum, regval); |
| 806 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; |
| 807 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 808 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 809 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
| 810 | ®val); |
| 811 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); |
| 812 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; |
| 813 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ |
| 814 | " near_ackID=0x%02x\n", |
| 815 | pnum, far_ackid, far_linkstat, near_ackid); |
| 816 | |
| 817 | /* |
| 818 | * If required, synchronize ackIDs of near and |
| 819 | * far sides. |
| 820 | */ |
| 821 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || |
| 822 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { |
| 823 | /* Align near outstanding/outbound ackIDs with |
| 824 | * far inbound. |
| 825 | */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 826 | rio_write_config_32(rdev, |
| 827 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 828 | (near_ackid << 24) | |
| 829 | (far_ackid << 8) | far_ackid); |
| 830 | /* Align far outstanding/outbound ackIDs with |
| 831 | * near inbound. |
| 832 | */ |
| 833 | far_ackid++; |
| 834 | if (nextdev) |
| 835 | rio_write_config_32(nextdev, |
| 836 | nextdev->phys_efptr + |
| 837 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), |
| 838 | (far_ackid << 24) | |
| 839 | (near_ackid << 8) | near_ackid); |
| 840 | else |
| 841 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); |
| 842 | } |
| 843 | rd_err: |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 844 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 845 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
| 846 | &err_status); |
| 847 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); |
| 848 | } |
| 849 | |
| 850 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { |
| 851 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); |
| 852 | rio_get_input_status(nextdev, |
| 853 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); |
| 854 | udelay(50); |
| 855 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 856 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 857 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
| 858 | &err_status); |
| 859 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); |
| 860 | } |
| 861 | |
| 862 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | |
| 863 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; |
| 864 | } |
| 865 | |
| 866 | /** |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 867 | * rio_inb_pwrite_handler - process inbound port-write message |
| 868 | * @pw_msg: pointer to inbound port-write message |
| 869 | * |
| 870 | * Processes an inbound port-write message. Returns 0 if the request |
| 871 | * has been satisfied. |
| 872 | */ |
| 873 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) |
| 874 | { |
| 875 | struct rio_dev *rdev; |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 876 | u32 err_status, em_perrdet, em_ltlerrdet; |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 877 | int rc, portnum; |
| 878 | |
Alexandre Bounine | e653692 | 2011-01-12 17:00:40 -0800 | [diff] [blame] | 879 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 880 | if (rdev == NULL) { |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 881 | /* Device removed or enumeration error */ |
| 882 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 883 | __func__, pw_msg->em.comptag); |
| 884 | return -EIO; |
| 885 | } |
| 886 | |
| 887 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); |
| 888 | |
| 889 | #ifdef DEBUG_PW |
| 890 | { |
| 891 | u32 i; |
| 892 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 893 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 894 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
| 895 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); |
| 896 | i += 4; |
| 897 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 898 | } |
| 899 | #endif |
| 900 | |
| 901 | /* Call an external service function (if such is registered |
| 902 | * for this device). This may be the service for endpoints that send |
| 903 | * device-specific port-write messages. End-point messages expected |
| 904 | * to be handled completely by EP specific device driver. |
| 905 | * For switches rc==0 signals that no standard processing required. |
| 906 | */ |
| 907 | if (rdev->pwcback != NULL) { |
| 908 | rc = rdev->pwcback(rdev, pw_msg, 0); |
| 909 | if (rc == 0) |
| 910 | return 0; |
| 911 | } |
| 912 | |
Alexandre Bounine | 6429cd4 | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 913 | portnum = pw_msg->em.is_port & 0xFF; |
| 914 | |
| 915 | /* Check if device and route to it are functional: |
| 916 | * Sometimes devices may send PW message(s) just before being |
| 917 | * powered down (or link being lost). |
| 918 | */ |
| 919 | if (rio_chk_dev_access(rdev)) { |
| 920 | pr_debug("RIO: device access failed - get link partner\n"); |
| 921 | /* Scan route to the device and identify failed link. |
| 922 | * This will replace device and port reported in PW message. |
| 923 | * PW message should not be used after this point. |
| 924 | */ |
| 925 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { |
| 926 | pr_err("RIO: Route trace for %s failed\n", |
| 927 | rio_name(rdev)); |
| 928 | return -EIO; |
| 929 | } |
| 930 | pw_msg = NULL; |
| 931 | } |
| 932 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 933 | /* For End-point devices processing stops here */ |
| 934 | if (!(rdev->pef & RIO_PEF_SWITCH)) |
| 935 | return 0; |
| 936 | |
| 937 | if (rdev->phys_efptr == 0) { |
| 938 | pr_err("RIO_PW: Bad switch initialization for %s\n", |
| 939 | rio_name(rdev)); |
| 940 | return 0; |
| 941 | } |
| 942 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 943 | /* |
| 944 | * Process the port-write notification from switch |
| 945 | */ |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 946 | if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle) |
| 947 | rdev->rswitch->ops->em_handle(rdev, portnum); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 948 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 949 | rio_read_config_32(rdev, |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 950 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
| 951 | &err_status); |
| 952 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); |
| 953 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 954 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 955 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 956 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
| 957 | rdev->rswitch->port_ok |= (1 << portnum); |
| 958 | rio_set_port_lockout(rdev, portnum, 0); |
| 959 | /* Schedule Insertion Service */ |
| 960 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", |
| 961 | rio_name(rdev), portnum); |
| 962 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 963 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 964 | /* Clear error-stopped states (if reported). |
| 965 | * Depending on the link partner state, two attempts |
| 966 | * may be needed for successful recovery. |
| 967 | */ |
| 968 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | |
| 969 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { |
| 970 | if (rio_clr_err_stopped(rdev, portnum, err_status)) |
| 971 | rio_clr_err_stopped(rdev, portnum, 0); |
| 972 | } |
| 973 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 974 | |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 975 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 976 | rdev->rswitch->port_ok &= ~(1 << portnum); |
| 977 | rio_set_port_lockout(rdev, portnum, 1); |
| 978 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 979 | rio_write_config_32(rdev, |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 980 | rdev->phys_efptr + |
| 981 | RIO_PORT_N_ACK_STS_CSR(portnum), |
| 982 | RIO_PORT_N_ACK_CLEAR); |
| 983 | |
| 984 | /* Schedule Extraction Service */ |
| 985 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", |
| 986 | rio_name(rdev), portnum); |
| 987 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 988 | } |
| 989 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 990 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 991 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
| 992 | if (em_perrdet) { |
| 993 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", |
| 994 | portnum, em_perrdet); |
| 995 | /* Clear EM Port N Error Detect CSR */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 996 | rio_write_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 997 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
| 998 | } |
| 999 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 1000 | rio_read_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 1001 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
| 1002 | if (em_ltlerrdet) { |
| 1003 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", |
| 1004 | em_ltlerrdet); |
| 1005 | /* Clear EM L/T Layer Error Detect CSR */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 1006 | rio_write_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 1007 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
| 1008 | } |
| 1009 | |
Alexandre Bounine | 388c45c | 2010-10-27 15:34:35 -0700 | [diff] [blame] | 1010 | /* Clear remaining error bits and Port-Write Pending bit */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 1011 | rio_write_config_32(rdev, |
Alexandre Bounine | dd5648c | 2010-10-27 15:34:30 -0700 | [diff] [blame] | 1012 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
Alexandre Bounine | 388c45c | 2010-10-27 15:34:35 -0700 | [diff] [blame] | 1013 | err_status); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 1014 | |
| 1015 | return 0; |
| 1016 | } |
| 1017 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); |
| 1018 | |
| 1019 | /** |
| 1020 | * rio_mport_get_efb - get pointer to next extended features block |
| 1021 | * @port: Master port to issue transaction |
| 1022 | * @local: Indicate a local master port or remote device access |
| 1023 | * @destid: Destination ID of the device |
| 1024 | * @hopcount: Number of switch hops to the device |
| 1025 | * @from: Offset of current Extended Feature block header (if 0 starts |
| 1026 | * from ExtFeaturePtr) |
| 1027 | */ |
| 1028 | u32 |
| 1029 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, |
| 1030 | u8 hopcount, u32 from) |
| 1031 | { |
| 1032 | u32 reg_val; |
| 1033 | |
| 1034 | if (from == 0) { |
| 1035 | if (local) |
| 1036 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, |
| 1037 | ®_val); |
| 1038 | else |
| 1039 | rio_mport_read_config_32(port, destid, hopcount, |
| 1040 | RIO_ASM_INFO_CAR, ®_val); |
| 1041 | return reg_val & RIO_EXT_FTR_PTR_MASK; |
| 1042 | } else { |
| 1043 | if (local) |
| 1044 | rio_local_read_config_32(port, from, ®_val); |
| 1045 | else |
| 1046 | rio_mport_read_config_32(port, destid, hopcount, |
| 1047 | from, ®_val); |
| 1048 | return RIO_GET_BLOCK_ID(reg_val); |
| 1049 | } |
| 1050 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1051 | EXPORT_SYMBOL_GPL(rio_mport_get_efb); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 1052 | |
| 1053 | /** |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1054 | * rio_mport_get_feature - query for devices' extended features |
| 1055 | * @port: Master port to issue transaction |
| 1056 | * @local: Indicate a local master port or remote device access |
| 1057 | * @destid: Destination ID of the device |
| 1058 | * @hopcount: Number of switch hops to the device |
| 1059 | * @ftr: Extended feature code |
| 1060 | * |
| 1061 | * Tell if a device supports a given RapidIO capability. |
| 1062 | * Returns the offset of the requested extended feature |
| 1063 | * block within the device's RIO configuration space or |
| 1064 | * 0 in case the device does not support it. Possible |
| 1065 | * values for @ftr: |
| 1066 | * |
| 1067 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices |
| 1068 | * |
| 1069 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices |
| 1070 | * |
| 1071 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices |
| 1072 | * |
| 1073 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices |
| 1074 | * |
| 1075 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices |
| 1076 | * |
| 1077 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices |
| 1078 | */ |
| 1079 | u32 |
| 1080 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, |
| 1081 | u8 hopcount, int ftr) |
| 1082 | { |
| 1083 | u32 asm_info, ext_ftr_ptr, ftr_header; |
| 1084 | |
| 1085 | if (local) |
| 1086 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); |
| 1087 | else |
| 1088 | rio_mport_read_config_32(port, destid, hopcount, |
| 1089 | RIO_ASM_INFO_CAR, &asm_info); |
| 1090 | |
| 1091 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; |
| 1092 | |
| 1093 | while (ext_ftr_ptr) { |
| 1094 | if (local) |
| 1095 | rio_local_read_config_32(port, ext_ftr_ptr, |
| 1096 | &ftr_header); |
| 1097 | else |
| 1098 | rio_mport_read_config_32(port, destid, hopcount, |
| 1099 | ext_ftr_ptr, &ftr_header); |
| 1100 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) |
| 1101 | return ext_ftr_ptr; |
| 1102 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) |
| 1103 | break; |
| 1104 | } |
| 1105 | |
| 1106 | return 0; |
| 1107 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1108 | EXPORT_SYMBOL_GPL(rio_mport_get_feature); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1109 | |
| 1110 | /** |
| 1111 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did |
| 1112 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids |
| 1113 | * @did: RIO did to match or %RIO_ANY_ID to match all dids |
| 1114 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids |
| 1115 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids |
| 1116 | * @from: Previous RIO device found in search, or %NULL for new search |
| 1117 | * |
| 1118 | * Iterates through the list of known RIO devices. If a RIO device is |
| 1119 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference |
| 1120 | * count to the device is incrememted and a pointer to its device |
| 1121 | * structure is returned. Otherwise, %NULL is returned. A new search |
| 1122 | * is initiated by passing %NULL to the @from argument. Otherwise, if |
| 1123 | * @from is not %NULL, searches continue from next device on the global |
| 1124 | * list. The reference count for @from is always decremented if it is |
| 1125 | * not %NULL. |
| 1126 | */ |
| 1127 | struct rio_dev *rio_get_asm(u16 vid, u16 did, |
| 1128 | u16 asm_vid, u16 asm_did, struct rio_dev *from) |
| 1129 | { |
| 1130 | struct list_head *n; |
| 1131 | struct rio_dev *rdev; |
| 1132 | |
| 1133 | WARN_ON(in_interrupt()); |
| 1134 | spin_lock(&rio_global_list_lock); |
| 1135 | n = from ? from->global_list.next : rio_devices.next; |
| 1136 | |
| 1137 | while (n && (n != &rio_devices)) { |
| 1138 | rdev = rio_dev_g(n); |
| 1139 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && |
| 1140 | (did == RIO_ANY_ID || rdev->did == did) && |
| 1141 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && |
| 1142 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) |
| 1143 | goto exit; |
| 1144 | n = n->next; |
| 1145 | } |
| 1146 | rdev = NULL; |
| 1147 | exit: |
| 1148 | rio_dev_put(from); |
| 1149 | rdev = rio_dev_get(rdev); |
| 1150 | spin_unlock(&rio_global_list_lock); |
| 1151 | return rdev; |
| 1152 | } |
| 1153 | |
| 1154 | /** |
| 1155 | * rio_get_device - Begin or continue searching for a RIO device by vid/did |
| 1156 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids |
| 1157 | * @did: RIO did to match or %RIO_ANY_ID to match all dids |
| 1158 | * @from: Previous RIO device found in search, or %NULL for new search |
| 1159 | * |
| 1160 | * Iterates through the list of known RIO devices. If a RIO device is |
| 1161 | * found with a matching @vid and @did, the reference count to the |
| 1162 | * device is incrememted and a pointer to its device structure is returned. |
| 1163 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL |
| 1164 | * to the @from argument. Otherwise, if @from is not %NULL, searches |
| 1165 | * continue from next device on the global list. The reference count for |
| 1166 | * @from is always decremented if it is not %NULL. |
| 1167 | */ |
| 1168 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) |
| 1169 | { |
| 1170 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); |
| 1171 | } |
| 1172 | |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1173 | /** |
| 1174 | * rio_std_route_add_entry - Add switch route table entry using standard |
| 1175 | * registers defined in RIO specification rev.1.3 |
| 1176 | * @mport: Master port to issue transaction |
| 1177 | * @destid: Destination ID of the device |
| 1178 | * @hopcount: Number of switch hops to the device |
| 1179 | * @table: routing table ID (global or port-specific) |
| 1180 | * @route_destid: destID entry in the RT |
| 1181 | * @route_port: destination port for specified destID |
| 1182 | */ |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 1183 | static int |
| 1184 | rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, |
| 1185 | u16 table, u16 route_destid, u8 route_port) |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1186 | { |
| 1187 | if (table == RIO_GLOBAL_TABLE) { |
| 1188 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1189 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, |
| 1190 | (u32)route_destid); |
| 1191 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1192 | RIO_STD_RTE_CONF_PORT_SEL_CSR, |
| 1193 | (u32)route_port); |
| 1194 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 1195 | |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1196 | udelay(10); |
| 1197 | return 0; |
| 1198 | } |
| 1199 | |
| 1200 | /** |
| 1201 | * 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] | 1202 | * associated with specified destID using standard registers defined in RIO |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1203 | * specification rev.1.3 |
| 1204 | * @mport: Master port to issue transaction |
| 1205 | * @destid: Destination ID of the device |
| 1206 | * @hopcount: Number of switch hops to the device |
| 1207 | * @table: routing table ID (global or port-specific) |
| 1208 | * @route_destid: destID entry in the RT |
| 1209 | * @route_port: returned destination port for specified destID |
| 1210 | */ |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 1211 | static int |
| 1212 | rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, |
| 1213 | u16 table, u16 route_destid, u8 *route_port) |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1214 | { |
| 1215 | u32 result; |
| 1216 | |
| 1217 | if (table == RIO_GLOBAL_TABLE) { |
| 1218 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1219 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); |
| 1220 | rio_mport_read_config_32(mport, destid, hopcount, |
| 1221 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); |
| 1222 | |
| 1223 | *route_port = (u8)result; |
| 1224 | } |
| 1225 | |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | /** |
| 1230 | * rio_std_route_clr_table - Clear swotch route table using standard registers |
| 1231 | * defined in RIO specification rev.1.3. |
| 1232 | * @mport: Master port to issue transaction |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1233 | * @destid: Destination ID of the device |
| 1234 | * @hopcount: Number of switch hops to the device |
| 1235 | * @table: routing table ID (global or port-specific) |
| 1236 | */ |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 1237 | static int |
| 1238 | rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, |
| 1239 | u16 table) |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 1240 | { |
| 1241 | u32 max_destid = 0xff; |
| 1242 | u32 i, pef, id_inc = 1, ext_cfg = 0; |
| 1243 | u32 port_sel = RIO_INVALID_ROUTE; |
| 1244 | |
| 1245 | if (table == RIO_GLOBAL_TABLE) { |
| 1246 | rio_mport_read_config_32(mport, destid, hopcount, |
| 1247 | RIO_PEF_CAR, &pef); |
| 1248 | |
| 1249 | if (mport->sys_size) { |
| 1250 | rio_mport_read_config_32(mport, destid, hopcount, |
| 1251 | RIO_SWITCH_RT_LIMIT, |
| 1252 | &max_destid); |
| 1253 | max_destid &= RIO_RT_MAX_DESTID; |
| 1254 | } |
| 1255 | |
| 1256 | if (pef & RIO_PEF_EXT_RT) { |
| 1257 | ext_cfg = 0x80000000; |
| 1258 | id_inc = 4; |
| 1259 | port_sel = (RIO_INVALID_ROUTE << 24) | |
| 1260 | (RIO_INVALID_ROUTE << 16) | |
| 1261 | (RIO_INVALID_ROUTE << 8) | |
| 1262 | RIO_INVALID_ROUTE; |
| 1263 | } |
| 1264 | |
| 1265 | for (i = 0; i <= max_destid;) { |
| 1266 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1267 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, |
| 1268 | ext_cfg | i); |
| 1269 | rio_mport_write_config_32(mport, destid, hopcount, |
| 1270 | RIO_STD_RTE_CONF_PORT_SEL_CSR, |
| 1271 | port_sel); |
| 1272 | i += id_inc; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | udelay(10); |
| 1277 | return 0; |
| 1278 | } |
| 1279 | |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 1280 | /** |
| 1281 | * rio_lock_device - Acquires host device lock for specified device |
| 1282 | * @port: Master port to send transaction |
| 1283 | * @destid: Destination ID for device/switch |
| 1284 | * @hopcount: Hopcount to reach switch |
| 1285 | * @wait_ms: Max wait time in msec (0 = no timeout) |
| 1286 | * |
| 1287 | * Attepts to acquire host device lock for specified device |
| 1288 | * Returns 0 if device lock acquired or EINVAL if timeout expires. |
| 1289 | */ |
| 1290 | int rio_lock_device(struct rio_mport *port, u16 destid, |
| 1291 | u8 hopcount, int wait_ms) |
| 1292 | { |
| 1293 | u32 result; |
| 1294 | int tcnt = 0; |
| 1295 | |
| 1296 | /* Attempt to acquire device lock */ |
| 1297 | rio_mport_write_config_32(port, destid, hopcount, |
| 1298 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); |
| 1299 | rio_mport_read_config_32(port, destid, hopcount, |
| 1300 | RIO_HOST_DID_LOCK_CSR, &result); |
| 1301 | |
| 1302 | while (result != port->host_deviceid) { |
| 1303 | if (wait_ms != 0 && tcnt == wait_ms) { |
| 1304 | pr_debug("RIO: timeout when locking device %x:%x\n", |
| 1305 | destid, hopcount); |
| 1306 | return -EINVAL; |
| 1307 | } |
| 1308 | |
| 1309 | /* Delay a bit */ |
| 1310 | mdelay(1); |
| 1311 | tcnt++; |
| 1312 | /* Try to acquire device lock again */ |
| 1313 | rio_mport_write_config_32(port, destid, |
| 1314 | hopcount, |
| 1315 | RIO_HOST_DID_LOCK_CSR, |
| 1316 | port->host_deviceid); |
| 1317 | rio_mport_read_config_32(port, destid, |
| 1318 | hopcount, |
| 1319 | RIO_HOST_DID_LOCK_CSR, &result); |
| 1320 | } |
| 1321 | |
| 1322 | return 0; |
| 1323 | } |
| 1324 | EXPORT_SYMBOL_GPL(rio_lock_device); |
| 1325 | |
| 1326 | /** |
| 1327 | * rio_unlock_device - Releases host device lock for specified device |
| 1328 | * @port: Master port to send transaction |
| 1329 | * @destid: Destination ID for device/switch |
| 1330 | * @hopcount: Hopcount to reach switch |
| 1331 | * |
| 1332 | * Returns 0 if device lock released or EINVAL if fails. |
| 1333 | */ |
| 1334 | int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) |
| 1335 | { |
| 1336 | u32 result; |
| 1337 | |
| 1338 | /* Release device lock */ |
| 1339 | rio_mport_write_config_32(port, destid, |
| 1340 | hopcount, |
| 1341 | RIO_HOST_DID_LOCK_CSR, |
| 1342 | port->host_deviceid); |
| 1343 | rio_mport_read_config_32(port, destid, hopcount, |
| 1344 | RIO_HOST_DID_LOCK_CSR, &result); |
| 1345 | if ((result & 0xffff) != 0xffff) { |
| 1346 | pr_debug("RIO: badness when releasing device lock %x:%x\n", |
| 1347 | destid, hopcount); |
| 1348 | return -EINVAL; |
| 1349 | } |
| 1350 | |
| 1351 | return 0; |
| 1352 | } |
| 1353 | EXPORT_SYMBOL_GPL(rio_unlock_device); |
| 1354 | |
| 1355 | /** |
| 1356 | * rio_route_add_entry- Add a route entry to a switch routing table |
| 1357 | * @rdev: RIO device |
| 1358 | * @table: Routing table ID |
| 1359 | * @route_destid: Destination ID to be routed |
| 1360 | * @route_port: Port number to be routed |
| 1361 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) |
| 1362 | * |
| 1363 | * If available calls the switch specific add_entry() method to add a route |
| 1364 | * entry into a switch routing table. Otherwise uses standard RT update method |
| 1365 | * as defined by RapidIO specification. A specific routing table can be selected |
| 1366 | * using the @table argument if a switch has per port routing tables or |
| 1367 | * the standard (or global) table may be used by passing |
| 1368 | * %RIO_GLOBAL_TABLE in @table. |
| 1369 | * |
| 1370 | * Returns %0 on success or %-EINVAL on failure. |
| 1371 | */ |
| 1372 | int rio_route_add_entry(struct rio_dev *rdev, |
| 1373 | u16 table, u16 route_destid, u8 route_port, int lock) |
| 1374 | { |
| 1375 | int rc = -EINVAL; |
| 1376 | struct rio_switch_ops *ops = rdev->rswitch->ops; |
| 1377 | |
| 1378 | if (lock) { |
| 1379 | rc = rio_lock_device(rdev->net->hport, rdev->destid, |
| 1380 | rdev->hopcount, 1000); |
| 1381 | if (rc) |
| 1382 | return rc; |
| 1383 | } |
| 1384 | |
| 1385 | spin_lock(&rdev->rswitch->lock); |
| 1386 | |
| 1387 | if (ops == NULL || ops->add_entry == NULL) { |
| 1388 | rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid, |
| 1389 | rdev->hopcount, table, |
| 1390 | route_destid, route_port); |
| 1391 | } else if (try_module_get(ops->owner)) { |
| 1392 | rc = ops->add_entry(rdev->net->hport, rdev->destid, |
| 1393 | rdev->hopcount, table, route_destid, |
| 1394 | route_port); |
| 1395 | module_put(ops->owner); |
| 1396 | } |
| 1397 | |
| 1398 | spin_unlock(&rdev->rswitch->lock); |
| 1399 | |
| 1400 | if (lock) |
| 1401 | rio_unlock_device(rdev->net->hport, rdev->destid, |
| 1402 | rdev->hopcount); |
| 1403 | |
| 1404 | return rc; |
| 1405 | } |
| 1406 | EXPORT_SYMBOL_GPL(rio_route_add_entry); |
| 1407 | |
| 1408 | /** |
| 1409 | * rio_route_get_entry- Read an entry from a switch routing table |
| 1410 | * @rdev: RIO device |
| 1411 | * @table: Routing table ID |
| 1412 | * @route_destid: Destination ID to be routed |
| 1413 | * @route_port: Pointer to read port number into |
| 1414 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) |
| 1415 | * |
| 1416 | * If available calls the switch specific get_entry() method to fetch a route |
| 1417 | * entry from a switch routing table. Otherwise uses standard RT read method |
| 1418 | * as defined by RapidIO specification. A specific routing table can be selected |
| 1419 | * using the @table argument if a switch has per port routing tables or |
| 1420 | * the standard (or global) table may be used by passing |
| 1421 | * %RIO_GLOBAL_TABLE in @table. |
| 1422 | * |
| 1423 | * Returns %0 on success or %-EINVAL on failure. |
| 1424 | */ |
| 1425 | int rio_route_get_entry(struct rio_dev *rdev, u16 table, |
| 1426 | u16 route_destid, u8 *route_port, int lock) |
| 1427 | { |
| 1428 | int rc = -EINVAL; |
| 1429 | struct rio_switch_ops *ops = rdev->rswitch->ops; |
| 1430 | |
| 1431 | if (lock) { |
| 1432 | rc = rio_lock_device(rdev->net->hport, rdev->destid, |
| 1433 | rdev->hopcount, 1000); |
| 1434 | if (rc) |
| 1435 | return rc; |
| 1436 | } |
| 1437 | |
| 1438 | spin_lock(&rdev->rswitch->lock); |
| 1439 | |
| 1440 | if (ops == NULL || ops->get_entry == NULL) { |
| 1441 | rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid, |
| 1442 | rdev->hopcount, table, |
| 1443 | route_destid, route_port); |
| 1444 | } else if (try_module_get(ops->owner)) { |
| 1445 | rc = ops->get_entry(rdev->net->hport, rdev->destid, |
| 1446 | rdev->hopcount, table, route_destid, |
| 1447 | route_port); |
| 1448 | module_put(ops->owner); |
| 1449 | } |
| 1450 | |
| 1451 | spin_unlock(&rdev->rswitch->lock); |
| 1452 | |
| 1453 | if (lock) |
| 1454 | rio_unlock_device(rdev->net->hport, rdev->destid, |
| 1455 | rdev->hopcount); |
| 1456 | return rc; |
| 1457 | } |
| 1458 | EXPORT_SYMBOL_GPL(rio_route_get_entry); |
| 1459 | |
| 1460 | /** |
| 1461 | * rio_route_clr_table - Clear a switch routing table |
| 1462 | * @rdev: RIO device |
| 1463 | * @table: Routing table ID |
| 1464 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) |
| 1465 | * |
| 1466 | * If available calls the switch specific clr_table() method to clear a switch |
| 1467 | * routing table. Otherwise uses standard RT write method as defined by RapidIO |
| 1468 | * specification. A specific routing table can be selected using the @table |
| 1469 | * argument if a switch has per port routing tables or the standard (or global) |
| 1470 | * table may be used by passing %RIO_GLOBAL_TABLE in @table. |
| 1471 | * |
| 1472 | * Returns %0 on success or %-EINVAL on failure. |
| 1473 | */ |
| 1474 | int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock) |
| 1475 | { |
| 1476 | int rc = -EINVAL; |
| 1477 | struct rio_switch_ops *ops = rdev->rswitch->ops; |
| 1478 | |
| 1479 | if (lock) { |
| 1480 | rc = rio_lock_device(rdev->net->hport, rdev->destid, |
| 1481 | rdev->hopcount, 1000); |
| 1482 | if (rc) |
| 1483 | return rc; |
| 1484 | } |
| 1485 | |
| 1486 | spin_lock(&rdev->rswitch->lock); |
| 1487 | |
| 1488 | if (ops == NULL || ops->clr_table == NULL) { |
| 1489 | rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid, |
| 1490 | rdev->hopcount, table); |
| 1491 | } else if (try_module_get(ops->owner)) { |
| 1492 | rc = ops->clr_table(rdev->net->hport, rdev->destid, |
| 1493 | rdev->hopcount, table); |
| 1494 | |
| 1495 | module_put(ops->owner); |
| 1496 | } |
| 1497 | |
| 1498 | spin_unlock(&rdev->rswitch->lock); |
| 1499 | |
| 1500 | if (lock) |
| 1501 | rio_unlock_device(rdev->net->hport, rdev->destid, |
| 1502 | rdev->hopcount); |
| 1503 | |
| 1504 | return rc; |
| 1505 | } |
| 1506 | EXPORT_SYMBOL_GPL(rio_route_clr_table); |
| 1507 | |
Alexandre Bounine | e42d98e | 2012-05-31 16:26:38 -0700 | [diff] [blame] | 1508 | #ifdef CONFIG_RAPIDIO_DMA_ENGINE |
| 1509 | |
| 1510 | static bool rio_chan_filter(struct dma_chan *chan, void *arg) |
| 1511 | { |
| 1512 | struct rio_dev *rdev = arg; |
| 1513 | |
| 1514 | /* Check that DMA device belongs to the right MPORT */ |
| 1515 | return (rdev->net->hport == |
| 1516 | container_of(chan->device, struct rio_mport, dma)); |
| 1517 | } |
| 1518 | |
| 1519 | /** |
| 1520 | * rio_request_dma - request RapidIO capable DMA channel that supports |
| 1521 | * specified target RapidIO device. |
| 1522 | * @rdev: RIO device control structure |
| 1523 | * |
| 1524 | * Returns pointer to allocated DMA channel or NULL if failed. |
| 1525 | */ |
| 1526 | struct dma_chan *rio_request_dma(struct rio_dev *rdev) |
| 1527 | { |
| 1528 | dma_cap_mask_t mask; |
| 1529 | struct dma_chan *dchan; |
| 1530 | |
| 1531 | dma_cap_zero(mask); |
| 1532 | dma_cap_set(DMA_SLAVE, mask); |
| 1533 | dchan = dma_request_channel(mask, rio_chan_filter, rdev); |
| 1534 | |
| 1535 | return dchan; |
| 1536 | } |
| 1537 | EXPORT_SYMBOL_GPL(rio_request_dma); |
| 1538 | |
| 1539 | /** |
| 1540 | * rio_release_dma - release specified DMA channel |
| 1541 | * @dchan: DMA channel to release |
| 1542 | */ |
| 1543 | void rio_release_dma(struct dma_chan *dchan) |
| 1544 | { |
| 1545 | dma_release_channel(dchan); |
| 1546 | } |
| 1547 | EXPORT_SYMBOL_GPL(rio_release_dma); |
| 1548 | |
| 1549 | /** |
| 1550 | * rio_dma_prep_slave_sg - RapidIO specific wrapper |
| 1551 | * for device_prep_slave_sg callback defined by DMAENGINE. |
| 1552 | * @rdev: RIO device control structure |
| 1553 | * @dchan: DMA channel to configure |
| 1554 | * @data: RIO specific data descriptor |
| 1555 | * @direction: DMA data transfer direction (TO or FROM the device) |
| 1556 | * @flags: dmaengine defined flags |
| 1557 | * |
| 1558 | * Initializes RapidIO capable DMA channel for the specified data transfer. |
| 1559 | * Uses DMA channel private extension to pass information related to remote |
| 1560 | * target RIO device. |
| 1561 | * Returns pointer to DMA transaction descriptor or NULL if failed. |
| 1562 | */ |
| 1563 | struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, |
| 1564 | struct dma_chan *dchan, struct rio_dma_data *data, |
| 1565 | enum dma_transfer_direction direction, unsigned long flags) |
| 1566 | { |
| 1567 | struct dma_async_tx_descriptor *txd = NULL; |
| 1568 | struct rio_dma_ext rio_ext; |
| 1569 | |
| 1570 | if (dchan->device->device_prep_slave_sg == NULL) { |
| 1571 | pr_err("%s: prep_rio_sg == NULL\n", __func__); |
| 1572 | return NULL; |
| 1573 | } |
| 1574 | |
| 1575 | rio_ext.destid = rdev->destid; |
| 1576 | rio_ext.rio_addr_u = data->rio_addr_u; |
| 1577 | rio_ext.rio_addr = data->rio_addr; |
| 1578 | rio_ext.wr_type = data->wr_type; |
| 1579 | |
| 1580 | txd = dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, |
| 1581 | direction, flags, &rio_ext); |
| 1582 | |
| 1583 | return txd; |
| 1584 | } |
| 1585 | EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); |
| 1586 | |
| 1587 | #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ |
| 1588 | |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1589 | /** |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 1590 | * rio_find_mport - find RIO mport by its ID |
| 1591 | * @mport_id: number (ID) of mport device |
| 1592 | * |
| 1593 | * Given a RIO mport number, the desired mport is located |
| 1594 | * in the global list of mports. If the mport is found, a pointer to its |
| 1595 | * data structure is returned. If no mport is found, %NULL is returned. |
| 1596 | */ |
| 1597 | struct rio_mport *rio_find_mport(int mport_id) |
| 1598 | { |
| 1599 | struct rio_mport *port; |
| 1600 | |
| 1601 | mutex_lock(&rio_mport_list_lock); |
| 1602 | list_for_each_entry(port, &rio_mports, node) { |
| 1603 | if (port->id == mport_id) |
| 1604 | goto found; |
| 1605 | } |
| 1606 | port = NULL; |
| 1607 | found: |
| 1608 | mutex_unlock(&rio_mport_list_lock); |
| 1609 | |
| 1610 | return port; |
| 1611 | } |
| 1612 | |
| 1613 | /** |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1614 | * rio_register_scan - enumeration/discovery method registration interface |
| 1615 | * @mport_id: mport device ID for which fabric scan routine has to be set |
| 1616 | * (RIO_MPORT_ANY = set for all available mports) |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1617 | * @scan_ops: enumeration/discovery operations structure |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1618 | * |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1619 | * Registers enumeration/discovery operations with RapidIO subsystem and |
| 1620 | * attaches it to the specified mport device (or all available mports |
| 1621 | * if RIO_MPORT_ANY is specified). |
| 1622 | * |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1623 | * Returns error if the mport already has an enumerator attached to it. |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1624 | * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error). |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1625 | */ |
| 1626 | int rio_register_scan(int mport_id, struct rio_scan *scan_ops) |
| 1627 | { |
| 1628 | struct rio_mport *port; |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1629 | struct rio_scan_node *scan; |
| 1630 | int rc = 0; |
| 1631 | |
| 1632 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); |
| 1633 | |
| 1634 | if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) || |
| 1635 | !scan_ops) |
| 1636 | return -EINVAL; |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1637 | |
| 1638 | mutex_lock(&rio_mport_list_lock); |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1639 | |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1640 | /* |
| 1641 | * Check if there is another enumerator already registered for |
| 1642 | * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators |
| 1643 | * for the same mport ID are not supported. |
| 1644 | */ |
| 1645 | list_for_each_entry(scan, &rio_scans, node) { |
| 1646 | if (scan->mport_id == mport_id) { |
| 1647 | rc = -EBUSY; |
| 1648 | goto err_out; |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1649 | } |
| 1650 | } |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1651 | |
| 1652 | /* |
| 1653 | * Allocate and initialize new scan registration node. |
| 1654 | */ |
| 1655 | scan = kzalloc(sizeof(*scan), GFP_KERNEL); |
| 1656 | if (!scan) { |
| 1657 | rc = -ENOMEM; |
| 1658 | goto err_out; |
| 1659 | } |
| 1660 | |
| 1661 | scan->mport_id = mport_id; |
| 1662 | scan->ops = scan_ops; |
| 1663 | |
| 1664 | /* |
| 1665 | * Traverse the list of registered mports to attach this new scan. |
| 1666 | * |
| 1667 | * The new scan with matching mport ID overrides any previously attached |
| 1668 | * scan assuming that old scan (if any) is the default one (based on the |
| 1669 | * enumerator registration check above). |
| 1670 | * If the new scan is the global one, it will be attached only to mports |
| 1671 | * that do not have their own individual operations already attached. |
| 1672 | */ |
| 1673 | list_for_each_entry(port, &rio_mports, node) { |
| 1674 | if (port->id == mport_id) { |
| 1675 | port->nscan = scan_ops; |
| 1676 | break; |
| 1677 | } else if (mport_id == RIO_MPORT_ANY && !port->nscan) |
| 1678 | port->nscan = scan_ops; |
| 1679 | } |
| 1680 | |
| 1681 | list_add_tail(&scan->node, &rio_scans); |
| 1682 | |
| 1683 | err_out: |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1684 | mutex_unlock(&rio_mport_list_lock); |
| 1685 | |
| 1686 | return rc; |
| 1687 | } |
| 1688 | EXPORT_SYMBOL_GPL(rio_register_scan); |
| 1689 | |
| 1690 | /** |
| 1691 | * rio_unregister_scan - removes enumeration/discovery method from mport |
| 1692 | * @mport_id: mport device ID for which fabric scan routine has to be |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1693 | * unregistered (RIO_MPORT_ANY = apply to all mports that use |
| 1694 | * the specified scan_ops) |
| 1695 | * @scan_ops: enumeration/discovery operations structure |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1696 | * |
| 1697 | * Removes enumeration or discovery method assigned to the specified mport |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1698 | * device. If RIO_MPORT_ANY is specified, removes the specified operations from |
| 1699 | * all mports that have them attached. |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1700 | */ |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1701 | int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops) |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1702 | { |
| 1703 | struct rio_mport *port; |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1704 | struct rio_scan_node *scan; |
| 1705 | |
| 1706 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); |
| 1707 | |
| 1708 | if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) |
| 1709 | return -EINVAL; |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1710 | |
| 1711 | mutex_lock(&rio_mport_list_lock); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1712 | |
| 1713 | list_for_each_entry(port, &rio_mports, node) |
| 1714 | if (port->id == mport_id || |
| 1715 | (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops)) |
| 1716 | port->nscan = NULL; |
| 1717 | |
Dan Carpenter | f93f3c4 | 2013-07-31 13:53:34 -0700 | [diff] [blame] | 1718 | list_for_each_entry(scan, &rio_scans, node) { |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1719 | if (scan->mport_id == mport_id) { |
| 1720 | list_del(&scan->node); |
| 1721 | kfree(scan); |
Dan Carpenter | f93f3c4 | 2013-07-31 13:53:34 -0700 | [diff] [blame] | 1722 | break; |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1723 | } |
Dan Carpenter | f93f3c4 | 2013-07-31 13:53:34 -0700 | [diff] [blame] | 1724 | } |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1725 | |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1726 | mutex_unlock(&rio_mport_list_lock); |
| 1727 | |
| 1728 | return 0; |
| 1729 | } |
| 1730 | EXPORT_SYMBOL_GPL(rio_unregister_scan); |
| 1731 | |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1732 | /** |
| 1733 | * rio_mport_scan - execute enumeration/discovery on the specified mport |
| 1734 | * @mport_id: number (ID) of mport device |
| 1735 | */ |
| 1736 | int rio_mport_scan(int mport_id) |
| 1737 | { |
| 1738 | struct rio_mport *port = NULL; |
| 1739 | int rc; |
| 1740 | |
| 1741 | mutex_lock(&rio_mport_list_lock); |
| 1742 | list_for_each_entry(port, &rio_mports, node) { |
| 1743 | if (port->id == mport_id) |
| 1744 | goto found; |
| 1745 | } |
| 1746 | mutex_unlock(&rio_mport_list_lock); |
| 1747 | return -ENODEV; |
| 1748 | found: |
| 1749 | if (!port->nscan) { |
| 1750 | mutex_unlock(&rio_mport_list_lock); |
| 1751 | return -EINVAL; |
| 1752 | } |
| 1753 | |
| 1754 | if (!try_module_get(port->nscan->owner)) { |
| 1755 | mutex_unlock(&rio_mport_list_lock); |
| 1756 | return -ENODEV; |
| 1757 | } |
| 1758 | |
| 1759 | mutex_unlock(&rio_mport_list_lock); |
| 1760 | |
| 1761 | if (port->host_deviceid >= 0) |
| 1762 | rc = port->nscan->enumerate(port, 0); |
| 1763 | else |
| 1764 | rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); |
| 1765 | |
| 1766 | module_put(port->nscan->owner); |
| 1767 | return rc; |
| 1768 | } |
| 1769 | |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1770 | static void rio_fixup_device(struct rio_dev *dev) |
| 1771 | { |
| 1772 | } |
| 1773 | |
Bill Pemberton | 305c891 | 2012-11-19 13:23:25 -0500 | [diff] [blame] | 1774 | static int rio_init(void) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1775 | { |
| 1776 | struct rio_dev *dev = NULL; |
| 1777 | |
| 1778 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { |
| 1779 | rio_fixup_device(dev); |
| 1780 | } |
| 1781 | return 0; |
| 1782 | } |
| 1783 | |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1784 | static struct workqueue_struct *rio_wq; |
| 1785 | |
| 1786 | struct rio_disc_work { |
| 1787 | struct work_struct work; |
| 1788 | struct rio_mport *mport; |
| 1789 | }; |
| 1790 | |
Bill Pemberton | 305c891 | 2012-11-19 13:23:25 -0500 | [diff] [blame] | 1791 | static void disc_work_handler(struct work_struct *_work) |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1792 | { |
| 1793 | struct rio_disc_work *work; |
| 1794 | |
| 1795 | work = container_of(_work, struct rio_disc_work, work); |
| 1796 | pr_debug("RIO: discovery work for mport %d %s\n", |
| 1797 | work->mport->id, work->mport->name); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1798 | if (try_module_get(work->mport->nscan->owner)) { |
| 1799 | work->mport->nscan->discover(work->mport, 0); |
| 1800 | module_put(work->mport->nscan->owner); |
| 1801 | } |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1802 | } |
| 1803 | |
Bill Pemberton | 305c891 | 2012-11-19 13:23:25 -0500 | [diff] [blame] | 1804 | int rio_init_mports(void) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1805 | { |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1806 | struct rio_mport *port; |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1807 | struct rio_disc_work *work; |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1808 | int n = 0; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1809 | |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1810 | if (!next_portid) |
| 1811 | return -ENODEV; |
| 1812 | |
| 1813 | /* |
| 1814 | * First, run enumerations and check if we need to perform discovery |
| 1815 | * on any of the registered mports. |
| 1816 | */ |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1817 | mutex_lock(&rio_mport_list_lock); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1818 | list_for_each_entry(port, &rio_mports, node) { |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1819 | if (port->host_deviceid >= 0) { |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1820 | if (port->nscan && try_module_get(port->nscan->owner)) { |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 1821 | port->nscan->enumerate(port, 0); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1822 | module_put(port->nscan->owner); |
| 1823 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1824 | } else |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1825 | n++; |
| 1826 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1827 | mutex_unlock(&rio_mport_list_lock); |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1828 | |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1829 | if (!n) |
| 1830 | goto no_disc; |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1831 | |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1832 | /* |
| 1833 | * If we have mports that require discovery schedule a discovery work |
| 1834 | * for each of them. If the code below fails to allocate needed |
| 1835 | * resources, exit without error to keep results of enumeration |
| 1836 | * process (if any). |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1837 | * TODO: Implement restart of discovery process for all or |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1838 | * individual discovering mports. |
| 1839 | */ |
| 1840 | rio_wq = alloc_workqueue("riodisc", 0, 0); |
| 1841 | if (!rio_wq) { |
| 1842 | pr_err("RIO: unable allocate rio_wq\n"); |
| 1843 | goto no_disc; |
| 1844 | } |
| 1845 | |
| 1846 | work = kcalloc(n, sizeof *work, GFP_KERNEL); |
| 1847 | if (!work) { |
| 1848 | pr_err("RIO: no memory for work struct\n"); |
| 1849 | destroy_workqueue(rio_wq); |
| 1850 | goto no_disc; |
| 1851 | } |
| 1852 | |
| 1853 | n = 0; |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1854 | mutex_lock(&rio_mport_list_lock); |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1855 | list_for_each_entry(port, &rio_mports, node) { |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1856 | if (port->host_deviceid < 0 && port->nscan) { |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1857 | work[n].mport = port; |
| 1858 | INIT_WORK(&work[n].work, disc_work_handler); |
| 1859 | queue_work(rio_wq, &work[n].work); |
| 1860 | n++; |
Alexandre Bounine | 005842e | 2012-10-04 17:16:08 -0700 | [diff] [blame] | 1861 | } |
| 1862 | } |
| 1863 | |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1864 | flush_workqueue(rio_wq); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1865 | mutex_unlock(&rio_mport_list_lock); |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1866 | pr_debug("RIO: destroy discovery workqueue\n"); |
| 1867 | destroy_workqueue(rio_wq); |
| 1868 | kfree(work); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1869 | |
Alexandre Bounine | 2574740 | 2012-10-10 15:53:59 -0700 | [diff] [blame] | 1870 | no_disc: |
Alexandre Bounine | 2f80998 | 2011-03-23 16:43:04 -0700 | [diff] [blame] | 1871 | rio_init(); |
| 1872 | |
Alexandre Bounine | c1256eb | 2011-03-23 16:43:06 -0700 | [diff] [blame] | 1873 | return 0; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1874 | } |
| 1875 | |
Alexandre Bounine | 569fccb | 2011-03-23 16:43:05 -0700 | [diff] [blame] | 1876 | static int rio_get_hdid(int index) |
| 1877 | { |
Alexandre Bounine | fdf90ab | 2013-07-03 15:08:56 -0700 | [diff] [blame] | 1878 | if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS) |
Alexandre Bounine | 569fccb | 2011-03-23 16:43:05 -0700 | [diff] [blame] | 1879 | return -1; |
| 1880 | |
Alexandre Bounine | fdf90ab | 2013-07-03 15:08:56 -0700 | [diff] [blame] | 1881 | return hdid[index]; |
Alexandre Bounine | 569fccb | 2011-03-23 16:43:05 -0700 | [diff] [blame] | 1882 | } |
| 1883 | |
Alexandre Bounine | 59f9996 | 2011-04-14 15:22:14 -0700 | [diff] [blame] | 1884 | int rio_register_mport(struct rio_mport *port) |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1885 | { |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1886 | struct rio_scan_node *scan = NULL; |
| 1887 | |
Alexandre Bounine | 569fccb | 2011-03-23 16:43:05 -0700 | [diff] [blame] | 1888 | if (next_portid >= RIO_MAX_MPORTS) { |
| 1889 | pr_err("RIO: reached specified max number of mports\n"); |
Alexandre Bounine | 59f9996 | 2011-04-14 15:22:14 -0700 | [diff] [blame] | 1890 | return 1; |
Alexandre Bounine | 569fccb | 2011-03-23 16:43:05 -0700 | [diff] [blame] | 1891 | } |
| 1892 | |
| 1893 | port->id = next_portid++; |
| 1894 | port->host_deviceid = rio_get_hdid(port->id); |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1895 | port->nscan = NULL; |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1896 | |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1897 | mutex_lock(&rio_mport_list_lock); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1898 | list_add_tail(&port->node, &rio_mports); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1899 | |
| 1900 | /* |
| 1901 | * Check if there are any registered enumeration/discovery operations |
| 1902 | * that have to be attached to the added mport. |
| 1903 | */ |
| 1904 | list_for_each_entry(scan, &rio_scans, node) { |
| 1905 | if (port->id == scan->mport_id || |
| 1906 | scan->mport_id == RIO_MPORT_ANY) { |
| 1907 | port->nscan = scan->ops; |
| 1908 | if (port->id == scan->mport_id) |
| 1909 | break; |
| 1910 | } |
| 1911 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1912 | mutex_unlock(&rio_mport_list_lock); |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1913 | |
| 1914 | pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id); |
Alexandre Bounine | 59f9996 | 2011-04-14 15:22:14 -0700 | [diff] [blame] | 1915 | return 0; |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1916 | } |
Alexandre Bounine | 94d9bd4 | 2013-07-03 15:08:55 -0700 | [diff] [blame] | 1917 | EXPORT_SYMBOL_GPL(rio_register_mport); |
Matt Porter | 394b701 | 2005-11-07 01:00:15 -0800 | [diff] [blame] | 1918 | |
| 1919 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); |
| 1920 | EXPORT_SYMBOL_GPL(rio_get_device); |
| 1921 | EXPORT_SYMBOL_GPL(rio_get_asm); |
| 1922 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); |
| 1923 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); |
| 1924 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); |
| 1925 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); |
| 1926 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); |
| 1927 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); |
| 1928 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); |
| 1929 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1930 | EXPORT_SYMBOL_GPL(rio_init_mports); |