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Commit | Line | Data |
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eb188d0e MP |
1 | /* |
2 | * RapidIO enumeration and discovery support | |
3 | * | |
4 | * Copyright 2005 MontaVista Software, Inc. | |
5 | * Matt Porter <mporter@kernel.crashing.org> | |
6 | * | |
e5cabeb3 AB |
7 | * Copyright 2009 Integrated Device Technology, Inc. |
8 | * Alex Bounine <alexandre.bounine@idt.com> | |
9 | * - Added Port-Write/Error Management initialization and handling | |
10 | * | |
933af4a6 TM |
11 | * Copyright 2009 Sysgo AG |
12 | * Thomas Moll <thomas.moll@sysgo.com> | |
13 | * - Added Input- Output- enable functionality, to allow full communication | |
14 | * | |
eb188d0e MP |
15 | * This program is free software; you can redistribute it and/or modify it |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | */ | |
20 | ||
eb188d0e MP |
21 | #include <linux/types.h> |
22 | #include <linux/kernel.h> | |
23 | ||
24 | #include <linux/delay.h> | |
fa78cc51 | 25 | #include <linux/dma-mapping.h> |
eb188d0e MP |
26 | #include <linux/init.h> |
27 | #include <linux/rio.h> | |
28 | #include <linux/rio_drv.h> | |
29 | #include <linux/rio_ids.h> | |
30 | #include <linux/rio_regs.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/timer.h> | |
fa3dbaa0 | 34 | #include <linux/sched.h> |
de25968c TS |
35 | #include <linux/jiffies.h> |
36 | #include <linux/slab.h> | |
eb188d0e MP |
37 | |
38 | #include "rio.h" | |
39 | ||
40 | LIST_HEAD(rio_devices); | |
eb188d0e | 41 | |
e5cabeb3 AB |
42 | static void rio_init_em(struct rio_dev *rdev); |
43 | ||
fa78cc51 MP |
44 | DEFINE_SPINLOCK(rio_global_list_lock); |
45 | ||
eb188d0e | 46 | static int next_destid = 0; |
af84ca38 | 47 | static int next_comptag = 1; |
eb188d0e | 48 | |
eb188d0e MP |
49 | static int rio_mport_phys_table[] = { |
50 | RIO_EFB_PAR_EP_ID, | |
51 | RIO_EFB_PAR_EP_REC_ID, | |
52 | RIO_EFB_SER_EP_ID, | |
53 | RIO_EFB_SER_EP_REC_ID, | |
54 | -1, | |
55 | }; | |
56 | ||
de74e00a AB |
57 | |
58 | /* | |
59 | * rio_destid_alloc - Allocate next available destID for given network | |
60 | * net: RIO network | |
61 | * | |
62 | * Returns next available device destination ID for the specified RIO network. | |
63 | * Marks allocated ID as one in use. | |
64 | * Returns RIO_INVALID_DESTID if new destID is not available. | |
65 | */ | |
66 | static u16 rio_destid_alloc(struct rio_net *net) | |
67 | { | |
68 | int destid; | |
69 | struct rio_id_table *idtab = &net->destid_table; | |
70 | ||
71 | spin_lock(&idtab->lock); | |
72 | destid = find_next_zero_bit(idtab->table, idtab->max, idtab->next); | |
73 | if (destid >= idtab->max) | |
74 | destid = find_first_zero_bit(idtab->table, idtab->max); | |
75 | ||
76 | if (destid < idtab->max) { | |
77 | idtab->next = destid + 1; | |
78 | if (idtab->next >= idtab->max) | |
79 | idtab->next = 0; | |
80 | set_bit(destid, idtab->table); | |
81 | destid += idtab->start; | |
82 | } else | |
83 | destid = RIO_INVALID_DESTID; | |
84 | ||
85 | spin_unlock(&idtab->lock); | |
86 | return (u16)destid; | |
87 | } | |
88 | ||
89 | /* | |
90 | * rio_destid_reserve - Reserve the specivied destID | |
91 | * net: RIO network | |
92 | * destid: destID to reserve | |
93 | * | |
94 | * Tries to reserve the specified destID. | |
95 | * Returns 0 if successfull. | |
96 | */ | |
97 | static int rio_destid_reserve(struct rio_net *net, u16 destid) | |
98 | { | |
99 | int oldbit; | |
100 | struct rio_id_table *idtab = &net->destid_table; | |
101 | ||
102 | destid -= idtab->start; | |
103 | spin_lock(&idtab->lock); | |
104 | oldbit = test_and_set_bit(destid, idtab->table); | |
105 | spin_unlock(&idtab->lock); | |
106 | return oldbit; | |
107 | } | |
108 | ||
109 | /* | |
110 | * rio_destid_free - free a previously allocated destID | |
111 | * net: RIO network | |
112 | * destid: destID to free | |
113 | * | |
114 | * Makes the specified destID available for use. | |
115 | */ | |
116 | static void rio_destid_free(struct rio_net *net, u16 destid) | |
117 | { | |
118 | struct rio_id_table *idtab = &net->destid_table; | |
119 | ||
120 | destid -= idtab->start; | |
121 | spin_lock(&idtab->lock); | |
122 | clear_bit(destid, idtab->table); | |
123 | spin_unlock(&idtab->lock); | |
124 | } | |
125 | ||
126 | /* | |
127 | * rio_destid_first - return first destID in use | |
128 | * net: RIO network | |
129 | */ | |
130 | static u16 rio_destid_first(struct rio_net *net) | |
131 | { | |
132 | int destid; | |
133 | struct rio_id_table *idtab = &net->destid_table; | |
134 | ||
135 | spin_lock(&idtab->lock); | |
136 | destid = find_first_bit(idtab->table, idtab->max); | |
137 | if (destid >= idtab->max) | |
138 | destid = RIO_INVALID_DESTID; | |
139 | else | |
140 | destid += idtab->start; | |
141 | spin_unlock(&idtab->lock); | |
142 | return (u16)destid; | |
143 | } | |
144 | ||
145 | /* | |
146 | * rio_destid_next - return next destID in use | |
147 | * net: RIO network | |
148 | * from: destination ID from which search shall continue | |
149 | */ | |
150 | static u16 rio_destid_next(struct rio_net *net, u16 from) | |
151 | { | |
152 | int destid; | |
153 | struct rio_id_table *idtab = &net->destid_table; | |
154 | ||
155 | spin_lock(&idtab->lock); | |
156 | destid = find_next_bit(idtab->table, idtab->max, from); | |
157 | if (destid >= idtab->max) | |
158 | destid = RIO_INVALID_DESTID; | |
159 | else | |
160 | destid += idtab->start; | |
161 | spin_unlock(&idtab->lock); | |
162 | return (u16)destid; | |
163 | } | |
164 | ||
eb188d0e MP |
165 | /** |
166 | * rio_get_device_id - Get the base/extended device id for a device | |
167 | * @port: RIO master port | |
168 | * @destid: Destination ID of device | |
169 | * @hopcount: Hopcount to device | |
170 | * | |
171 | * Reads the base/extended device id from a device. Returns the | |
172 | * 8/16-bit device ID. | |
173 | */ | |
174 | static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount) | |
175 | { | |
176 | u32 result; | |
177 | ||
178 | rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result); | |
179 | ||
e0423236 | 180 | return RIO_GET_DID(port->sys_size, result); |
eb188d0e MP |
181 | } |
182 | ||
183 | /** | |
184 | * rio_set_device_id - Set the base/extended device id for a device | |
185 | * @port: RIO master port | |
186 | * @destid: Destination ID of device | |
187 | * @hopcount: Hopcount to device | |
188 | * @did: Device ID value to be written | |
189 | * | |
190 | * Writes the base/extended device id from a device. | |
191 | */ | |
fa78cc51 | 192 | static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did) |
eb188d0e MP |
193 | { |
194 | rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR, | |
e0423236 | 195 | RIO_SET_DID(port->sys_size, did)); |
eb188d0e MP |
196 | } |
197 | ||
198 | /** | |
199 | * rio_local_set_device_id - Set the base/extended device id for a port | |
200 | * @port: RIO master port | |
201 | * @did: Device ID value to be written | |
202 | * | |
203 | * Writes the base/extended device id from a device. | |
204 | */ | |
205 | static void rio_local_set_device_id(struct rio_mport *port, u16 did) | |
206 | { | |
e0423236 ZW |
207 | rio_local_write_config_32(port, RIO_DID_CSR, RIO_SET_DID(port->sys_size, |
208 | did)); | |
eb188d0e MP |
209 | } |
210 | ||
211 | /** | |
212 | * rio_clear_locks- Release all host locks and signal enumeration complete | |
a7071efc | 213 | * @net: RIO network to run on |
eb188d0e MP |
214 | * |
215 | * Marks the component tag CSR on each device with the enumeration | |
216 | * complete flag. When complete, it then release the host locks on | |
217 | * each device. Returns 0 on success or %-EINVAL on failure. | |
218 | */ | |
a7071efc | 219 | static int rio_clear_locks(struct rio_net *net) |
eb188d0e | 220 | { |
a7071efc | 221 | struct rio_mport *port = net->hport; |
eb188d0e MP |
222 | struct rio_dev *rdev; |
223 | u32 result; | |
224 | int ret = 0; | |
225 | ||
eb188d0e MP |
226 | /* Release host device id locks */ |
227 | rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, | |
228 | port->host_deviceid); | |
229 | rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); | |
230 | if ((result & 0xffff) != 0xffff) { | |
231 | printk(KERN_INFO | |
232 | "RIO: badness when releasing host lock on master port, result %8.8x\n", | |
233 | result); | |
234 | ret = -EINVAL; | |
235 | } | |
a7071efc | 236 | list_for_each_entry(rdev, &net->devices, net_list) { |
eb188d0e MP |
237 | rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR, |
238 | port->host_deviceid); | |
239 | rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result); | |
240 | if ((result & 0xffff) != 0xffff) { | |
241 | printk(KERN_INFO | |
242 | "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n", | |
243 | rdev->vid, rdev->did); | |
244 | ret = -EINVAL; | |
245 | } | |
af84ca38 AB |
246 | |
247 | /* Mark device as discovered and enable master */ | |
248 | rio_read_config_32(rdev, | |
249 | rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, | |
250 | &result); | |
251 | result |= RIO_PORT_GEN_DISCOVERED | RIO_PORT_GEN_MASTER; | |
252 | rio_write_config_32(rdev, | |
253 | rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, | |
254 | result); | |
eb188d0e MP |
255 | } |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | /** | |
261 | * rio_enum_host- Set host lock and initialize host destination ID | |
262 | * @port: Master port to issue transaction | |
263 | * | |
264 | * Sets the local host master port lock and destination ID register | |
265 | * with the host device ID value. The host device ID value is provided | |
266 | * by the platform. Returns %0 on success or %-1 on failure. | |
267 | */ | |
268 | static int rio_enum_host(struct rio_mport *port) | |
269 | { | |
270 | u32 result; | |
271 | ||
272 | /* Set master port host device id lock */ | |
273 | rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, | |
274 | port->host_deviceid); | |
275 | ||
276 | rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); | |
277 | if ((result & 0xffff) != port->host_deviceid) | |
278 | return -1; | |
279 | ||
280 | /* Set master port destid and init destid ctr */ | |
281 | rio_local_set_device_id(port, port->host_deviceid); | |
eb188d0e MP |
282 | return 0; |
283 | } | |
284 | ||
285 | /** | |
286 | * rio_device_has_destid- Test if a device contains a destination ID register | |
287 | * @port: Master port to issue transaction | |
288 | * @src_ops: RIO device source operations | |
289 | * @dst_ops: RIO device destination operations | |
290 | * | |
291 | * Checks the provided @src_ops and @dst_ops for the necessary transaction | |
292 | * capabilities that indicate whether or not a device will implement a | |
293 | * destination ID register. Returns 1 if true or 0 if false. | |
294 | */ | |
295 | static int rio_device_has_destid(struct rio_mport *port, int src_ops, | |
296 | int dst_ops) | |
297 | { | |
fa78cc51 MP |
298 | u32 mask = RIO_OPS_READ | RIO_OPS_WRITE | RIO_OPS_ATOMIC_TST_SWP | RIO_OPS_ATOMIC_INC | RIO_OPS_ATOMIC_DEC | RIO_OPS_ATOMIC_SET | RIO_OPS_ATOMIC_CLR; |
299 | ||
300 | return !!((src_ops | dst_ops) & mask); | |
eb188d0e MP |
301 | } |
302 | ||
303 | /** | |
304 | * rio_release_dev- Frees a RIO device struct | |
305 | * @dev: LDM device associated with a RIO device struct | |
306 | * | |
307 | * Gets the RIO device struct associated a RIO device struct. | |
308 | * The RIO device struct is freed. | |
309 | */ | |
310 | static void rio_release_dev(struct device *dev) | |
311 | { | |
312 | struct rio_dev *rdev; | |
313 | ||
314 | rdev = to_rio_dev(dev); | |
315 | kfree(rdev); | |
316 | } | |
317 | ||
318 | /** | |
319 | * rio_is_switch- Tests if a RIO device has switch capabilities | |
320 | * @rdev: RIO device | |
321 | * | |
322 | * Gets the RIO device Processing Element Features register | |
323 | * contents and tests for switch capabilities. Returns 1 if | |
324 | * the device is a switch or 0 if it is not a switch. | |
325 | * The RIO device struct is freed. | |
326 | */ | |
327 | static int rio_is_switch(struct rio_dev *rdev) | |
328 | { | |
329 | if (rdev->pef & RIO_PEF_SWITCH) | |
330 | return 1; | |
331 | return 0; | |
332 | } | |
333 | ||
334 | /** | |
058f88d6 | 335 | * rio_switch_init - Sets switch operations for a particular vendor switch |
eb188d0e | 336 | * @rdev: RIO device |
058f88d6 | 337 | * @do_enum: Enumeration/Discovery mode flag |
eb188d0e | 338 | * |
058f88d6 AB |
339 | * Searches the RIO switch ops table for known switch types. If the vid |
340 | * and did match a switch table entry, then call switch initialization | |
341 | * routine to setup switch-specific routines. | |
eb188d0e | 342 | */ |
058f88d6 | 343 | static void rio_switch_init(struct rio_dev *rdev, int do_enum) |
eb188d0e | 344 | { |
058f88d6 AB |
345 | struct rio_switch_ops *cur = __start_rio_switch_ops; |
346 | struct rio_switch_ops *end = __end_rio_switch_ops; | |
eb188d0e MP |
347 | |
348 | while (cur < end) { | |
349 | if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { | |
058f88d6 AB |
350 | pr_debug("RIO: calling init routine for %s\n", |
351 | rio_name(rdev)); | |
352 | cur->init_hook(rdev, do_enum); | |
07590ff0 | 353 | break; |
eb188d0e MP |
354 | } |
355 | cur++; | |
356 | } | |
357 | ||
07590ff0 AB |
358 | if ((cur >= end) && (rdev->pef & RIO_PEF_STD_RT)) { |
359 | pr_debug("RIO: adding STD routing ops for %s\n", | |
360 | rio_name(rdev)); | |
361 | rdev->rswitch->add_entry = rio_std_route_add_entry; | |
362 | rdev->rswitch->get_entry = rio_std_route_get_entry; | |
363 | rdev->rswitch->clr_table = rio_std_route_clr_table; | |
364 | } | |
365 | ||
eb188d0e MP |
366 | if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) |
367 | printk(KERN_ERR "RIO: missing routing ops for %s\n", | |
368 | rio_name(rdev)); | |
369 | } | |
370 | ||
371 | /** | |
372 | * rio_add_device- Adds a RIO device to the device model | |
373 | * @rdev: RIO device | |
374 | * | |
375 | * Adds the RIO device to the global device list and adds the RIO | |
376 | * device to the RIO device list. Creates the generic sysfs nodes | |
377 | * for an RIO device. | |
378 | */ | |
5f28c520 | 379 | static int __devinit rio_add_device(struct rio_dev *rdev) |
eb188d0e | 380 | { |
5f28c520 LY |
381 | int err; |
382 | ||
383 | err = device_add(&rdev->dev); | |
384 | if (err) | |
385 | return err; | |
eb188d0e MP |
386 | |
387 | spin_lock(&rio_global_list_lock); | |
388 | list_add_tail(&rdev->global_list, &rio_devices); | |
389 | spin_unlock(&rio_global_list_lock); | |
390 | ||
391 | rio_create_sysfs_dev_files(rdev); | |
5f28c520 LY |
392 | |
393 | return 0; | |
eb188d0e MP |
394 | } |
395 | ||
933af4a6 | 396 | /** |
25985edc | 397 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of |
933af4a6 TM |
398 | * given port |
399 | * @port: Master port associated with the RIO network | |
400 | * @local: local=1 select local port otherwise a far device is reached | |
401 | * @destid: Destination ID of the device to check host bit | |
402 | * @hopcount: Number of hops to reach the target | |
403 | * @port_num: Port (-number on switch) to enable on a far end device | |
404 | * | |
405 | * Returns 0 or 1 from on General Control Command and Status Register | |
406 | * (EXT_PTR+0x3C) | |
407 | */ | |
408 | inline int rio_enable_rx_tx_port(struct rio_mport *port, | |
409 | int local, u16 destid, | |
410 | u8 hopcount, u8 port_num) { | |
411 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS | |
412 | u32 regval; | |
413 | u32 ext_ftr_ptr; | |
414 | ||
415 | /* | |
416 | * enable rx input tx output port | |
417 | */ | |
418 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " | |
419 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); | |
420 | ||
421 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); | |
422 | ||
423 | if (local) { | |
424 | rio_local_read_config_32(port, ext_ftr_ptr + | |
425 | RIO_PORT_N_CTL_CSR(0), | |
426 | ®val); | |
427 | } else { | |
428 | if (rio_mport_read_config_32(port, destid, hopcount, | |
429 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) | |
430 | return -EIO; | |
431 | } | |
432 | ||
433 | if (regval & RIO_PORT_N_CTL_P_TYP_SER) { | |
434 | /* serial */ | |
435 | regval = regval | RIO_PORT_N_CTL_EN_RX_SER | |
436 | | RIO_PORT_N_CTL_EN_TX_SER; | |
437 | } else { | |
438 | /* parallel */ | |
439 | regval = regval | RIO_PORT_N_CTL_EN_RX_PAR | |
440 | | RIO_PORT_N_CTL_EN_TX_PAR; | |
441 | } | |
442 | ||
443 | if (local) { | |
444 | rio_local_write_config_32(port, ext_ftr_ptr + | |
445 | RIO_PORT_N_CTL_CSR(0), regval); | |
446 | } else { | |
447 | if (rio_mport_write_config_32(port, destid, hopcount, | |
448 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) | |
449 | return -EIO; | |
450 | } | |
451 | #endif | |
452 | return 0; | |
453 | } | |
454 | ||
eb188d0e MP |
455 | /** |
456 | * rio_setup_device- Allocates and sets up a RIO device | |
457 | * @net: RIO network | |
458 | * @port: Master port to send transactions | |
459 | * @destid: Current destination ID | |
460 | * @hopcount: Current hopcount | |
461 | * @do_enum: Enumeration/Discovery mode flag | |
462 | * | |
463 | * Allocates a RIO device and configures fields based on configuration | |
464 | * space contents. If device has a destination ID register, a destination | |
465 | * ID is either assigned in enumeration mode or read from configuration | |
466 | * space in discovery mode. If the device has switch capabilities, then | |
467 | * a switch is allocated and configured appropriately. Returns a pointer | |
468 | * to a RIO device on success or NULL on failure. | |
469 | * | |
470 | */ | |
181a6ff0 | 471 | static struct rio_dev __devinit *rio_setup_device(struct rio_net *net, |
eb188d0e MP |
472 | struct rio_mport *port, u16 destid, |
473 | u8 hopcount, int do_enum) | |
474 | { | |
5f28c520 | 475 | int ret = 0; |
eb188d0e | 476 | struct rio_dev *rdev; |
5f28c520 | 477 | struct rio_switch *rswitch = NULL; |
eb188d0e | 478 | int result, rdid; |
ded05782 AB |
479 | size_t size; |
480 | u32 swpinfo = 0; | |
eb188d0e | 481 | |
ded05782 AB |
482 | size = sizeof(struct rio_dev); |
483 | if (rio_mport_read_config_32(port, destid, hopcount, | |
484 | RIO_PEF_CAR, &result)) | |
485 | return NULL; | |
486 | ||
487 | if (result & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) { | |
488 | rio_mport_read_config_32(port, destid, hopcount, | |
489 | RIO_SWP_INFO_CAR, &swpinfo); | |
490 | if (result & RIO_PEF_SWITCH) { | |
491 | size += (RIO_GET_TOTAL_PORTS(swpinfo) * | |
492 | sizeof(rswitch->nextdev[0])) + sizeof(*rswitch); | |
493 | } | |
494 | } | |
495 | ||
496 | rdev = kzalloc(size, GFP_KERNEL); | |
eb188d0e | 497 | if (!rdev) |
5f28c520 | 498 | return NULL; |
eb188d0e | 499 | |
eb188d0e | 500 | rdev->net = net; |
ded05782 AB |
501 | rdev->pef = result; |
502 | rdev->swpinfo = swpinfo; | |
eb188d0e MP |
503 | rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, |
504 | &result); | |
505 | rdev->did = result >> 16; | |
506 | rdev->vid = result & 0xffff; | |
507 | rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, | |
508 | &rdev->device_rev); | |
509 | rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, | |
510 | &result); | |
511 | rdev->asm_did = result >> 16; | |
512 | rdev->asm_vid = result & 0xffff; | |
513 | rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, | |
514 | &result); | |
515 | rdev->asm_rev = result >> 16; | |
e5cabeb3 | 516 | if (rdev->pef & RIO_PEF_EXT_FEATURES) { |
eb188d0e | 517 | rdev->efptr = result & 0xffff; |
e5cabeb3 AB |
518 | rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid, |
519 | hopcount); | |
520 | ||
521 | rdev->em_efptr = rio_mport_get_feature(port, 0, destid, | |
522 | hopcount, RIO_EFB_ERR_MGMNT); | |
523 | } | |
eb188d0e MP |
524 | |
525 | rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, | |
526 | &rdev->src_ops); | |
527 | rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, | |
528 | &rdev->dst_ops); | |
529 | ||
af84ca38 AB |
530 | if (do_enum) { |
531 | /* Assign component tag to device */ | |
532 | if (next_comptag >= 0x10000) { | |
533 | pr_err("RIO: Component Tag Counter Overflow\n"); | |
534 | goto cleanup; | |
535 | } | |
536 | rio_mport_write_config_32(port, destid, hopcount, | |
537 | RIO_COMPONENT_TAG_CSR, next_comptag); | |
538 | rdev->comp_tag = next_comptag++; | |
558bda65 AB |
539 | } else { |
540 | rio_mport_read_config_32(port, destid, hopcount, | |
541 | RIO_COMPONENT_TAG_CSR, | |
542 | &rdev->comp_tag); | |
af84ca38 AB |
543 | } |
544 | ||
c70555b0 AB |
545 | if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) { |
546 | if (do_enum) { | |
547 | rio_set_device_id(port, destid, hopcount, next_destid); | |
de74e00a AB |
548 | rdev->destid = next_destid; |
549 | next_destid = rio_destid_alloc(net); | |
c70555b0 AB |
550 | } else |
551 | rdev->destid = rio_get_device_id(port, destid, hopcount); | |
a93192a5 AB |
552 | |
553 | rdev->hopcount = 0xff; | |
554 | } else { | |
555 | /* Switch device has an associated destID which | |
556 | * will be adjusted later | |
557 | */ | |
558 | rdev->destid = destid; | |
559 | rdev->hopcount = hopcount; | |
560 | } | |
eb188d0e MP |
561 | |
562 | /* If a PE has both switch and other functions, show it as a switch */ | |
563 | if (rio_is_switch(rdev)) { | |
ded05782 | 564 | rswitch = rdev->rswitch; |
558bda65 | 565 | rswitch->switchid = rdev->comp_tag & RIO_CTAG_UDEVID; |
e5cabeb3 | 566 | rswitch->port_ok = 0; |
e0423236 ZW |
567 | rswitch->route_table = kzalloc(sizeof(u8)* |
568 | RIO_MAX_ROUTE_ENTRIES(port->sys_size), | |
569 | GFP_KERNEL); | |
5f28c520 LY |
570 | if (!rswitch->route_table) |
571 | goto cleanup; | |
eb188d0e | 572 | /* Initialize switch route table */ |
e0423236 ZW |
573 | for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size); |
574 | rdid++) | |
eb188d0e | 575 | rswitch->route_table[rdid] = RIO_INVALID_ROUTE; |
b53c7583 | 576 | dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id, |
ded05782 | 577 | rswitch->switchid); |
058f88d6 | 578 | rio_switch_init(rdev, do_enum); |
eb188d0e | 579 | |
ded05782 AB |
580 | if (do_enum && rswitch->clr_table) |
581 | rswitch->clr_table(port, destid, hopcount, | |
582 | RIO_GLOBAL_TABLE); | |
07590ff0 | 583 | |
a7071efc | 584 | list_add_tail(&rswitch->node, &net->switches); |
eb188d0e | 585 | |
933af4a6 TM |
586 | } else { |
587 | if (do_enum) | |
588 | /*Enable Input Output Port (transmitter reviever)*/ | |
589 | rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); | |
590 | ||
b53c7583 KS |
591 | dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, |
592 | rdev->destid); | |
933af4a6 | 593 | } |
eb188d0e MP |
594 | |
595 | rdev->dev.bus = &rio_bus_type; | |
2c70f022 | 596 | rdev->dev.parent = &rio_bus; |
eb188d0e MP |
597 | |
598 | device_initialize(&rdev->dev); | |
599 | rdev->dev.release = rio_release_dev; | |
600 | rio_dev_get(rdev); | |
601 | ||
284901a9 | 602 | rdev->dma_mask = DMA_BIT_MASK(32); |
fa78cc51 | 603 | rdev->dev.dma_mask = &rdev->dma_mask; |
284901a9 | 604 | rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
eb188d0e | 605 | |
284fb68d | 606 | if (rdev->dst_ops & RIO_DST_OPS_DOORBELL) |
eb188d0e MP |
607 | rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], |
608 | 0, 0xffff); | |
609 | ||
5f28c520 LY |
610 | ret = rio_add_device(rdev); |
611 | if (ret) | |
612 | goto cleanup; | |
eb188d0e | 613 | |
eb188d0e | 614 | return rdev; |
5f28c520 LY |
615 | |
616 | cleanup: | |
166c050b | 617 | if (rswitch) |
5f28c520 | 618 | kfree(rswitch->route_table); |
ded05782 | 619 | |
5f28c520 LY |
620 | kfree(rdev); |
621 | return NULL; | |
eb188d0e MP |
622 | } |
623 | ||
624 | /** | |
625 | * rio_sport_is_active- Tests if a switch port has an active connection. | |
626 | * @port: Master port to send transaction | |
627 | * @destid: Associated destination ID for switch | |
628 | * @hopcount: Hopcount to reach switch | |
629 | * @sport: Switch port number | |
630 | * | |
631 | * Reads the port error status CSR for a particular switch port to | |
632 | * determine if the port has an active link. Returns | |
e5cabeb3 | 633 | * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is |
eb188d0e MP |
634 | * inactive. |
635 | */ | |
636 | static int | |
637 | rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport) | |
638 | { | |
e5cabeb3 | 639 | u32 result = 0; |
eb188d0e MP |
640 | u32 ext_ftr_ptr; |
641 | ||
e5cabeb3 | 642 | ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 0); |
eb188d0e | 643 | |
e5cabeb3 AB |
644 | while (ext_ftr_ptr) { |
645 | rio_mport_read_config_32(port, destid, hopcount, | |
646 | ext_ftr_ptr, &result); | |
647 | result = RIO_GET_BLOCK_ID(result); | |
648 | if ((result == RIO_EFB_SER_EP_FREE_ID) || | |
649 | (result == RIO_EFB_SER_EP_FREE_ID_V13P) || | |
650 | (result == RIO_EFB_SER_EP_FREC_ID)) | |
eb188d0e | 651 | break; |
e5cabeb3 AB |
652 | |
653 | ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, | |
654 | ext_ftr_ptr); | |
655 | } | |
eb188d0e MP |
656 | |
657 | if (ext_ftr_ptr) | |
658 | rio_mport_read_config_32(port, destid, hopcount, | |
659 | ext_ftr_ptr + | |
660 | RIO_PORT_N_ERR_STS_CSR(sport), | |
661 | &result); | |
662 | ||
e5cabeb3 | 663 | return result & RIO_PORT_N_ERR_STS_PORT_OK; |
eb188d0e MP |
664 | } |
665 | ||
818a04a0 AB |
666 | /** |
667 | * rio_lock_device - Acquires host device lock for specified device | |
668 | * @port: Master port to send transaction | |
669 | * @destid: Destination ID for device/switch | |
670 | * @hopcount: Hopcount to reach switch | |
671 | * @wait_ms: Max wait time in msec (0 = no timeout) | |
672 | * | |
673 | * Attepts to acquire host device lock for specified device | |
674 | * Returns 0 if device lock acquired or EINVAL if timeout expires. | |
675 | */ | |
676 | static int | |
677 | rio_lock_device(struct rio_mport *port, u16 destid, u8 hopcount, int wait_ms) | |
678 | { | |
679 | u32 result; | |
680 | int tcnt = 0; | |
681 | ||
682 | /* Attempt to acquire device lock */ | |
683 | rio_mport_write_config_32(port, destid, hopcount, | |
684 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); | |
685 | rio_mport_read_config_32(port, destid, hopcount, | |
686 | RIO_HOST_DID_LOCK_CSR, &result); | |
687 | ||
688 | while (result != port->host_deviceid) { | |
689 | if (wait_ms != 0 && tcnt == wait_ms) { | |
690 | pr_debug("RIO: timeout when locking device %x:%x\n", | |
691 | destid, hopcount); | |
692 | return -EINVAL; | |
693 | } | |
694 | ||
695 | /* Delay a bit */ | |
696 | mdelay(1); | |
697 | tcnt++; | |
698 | /* Try to acquire device lock again */ | |
699 | rio_mport_write_config_32(port, destid, | |
700 | hopcount, | |
701 | RIO_HOST_DID_LOCK_CSR, | |
702 | port->host_deviceid); | |
703 | rio_mport_read_config_32(port, destid, | |
704 | hopcount, | |
705 | RIO_HOST_DID_LOCK_CSR, &result); | |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | /** | |
712 | * rio_unlock_device - Releases host device lock for specified device | |
713 | * @port: Master port to send transaction | |
714 | * @destid: Destination ID for device/switch | |
715 | * @hopcount: Hopcount to reach switch | |
716 | * | |
717 | * Returns 0 if device lock released or EINVAL if fails. | |
718 | */ | |
719 | static int | |
720 | rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) | |
721 | { | |
722 | u32 result; | |
723 | ||
724 | /* Release device lock */ | |
725 | rio_mport_write_config_32(port, destid, | |
726 | hopcount, | |
727 | RIO_HOST_DID_LOCK_CSR, | |
728 | port->host_deviceid); | |
729 | rio_mport_read_config_32(port, destid, hopcount, | |
730 | RIO_HOST_DID_LOCK_CSR, &result); | |
731 | if ((result & 0xffff) != 0xffff) { | |
732 | pr_debug("RIO: badness when releasing device lock %x:%x\n", | |
733 | destid, hopcount); | |
734 | return -EINVAL; | |
735 | } | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
eb188d0e MP |
740 | /** |
741 | * rio_route_add_entry- Add a route entry to a switch routing table | |
a93192a5 | 742 | * @rdev: RIO device |
eb188d0e MP |
743 | * @table: Routing table ID |
744 | * @route_destid: Destination ID to be routed | |
745 | * @route_port: Port number to be routed | |
818a04a0 | 746 | * @lock: lock switch device flag |
eb188d0e MP |
747 | * |
748 | * Calls the switch specific add_entry() method to add a route entry | |
749 | * on a switch. The route table can be specified using the @table | |
750 | * argument if a switch has per port routing tables or the normal | |
751 | * use is to specific all tables (or the global table) by passing | |
752 | * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL | |
753 | * on failure. | |
754 | */ | |
818a04a0 | 755 | static int |
a93192a5 | 756 | rio_route_add_entry(struct rio_dev *rdev, |
818a04a0 | 757 | u16 table, u16 route_destid, u8 route_port, int lock) |
eb188d0e | 758 | { |
818a04a0 AB |
759 | int rc; |
760 | ||
761 | if (lock) { | |
a93192a5 AB |
762 | rc = rio_lock_device(rdev->net->hport, rdev->destid, |
763 | rdev->hopcount, 1000); | |
818a04a0 AB |
764 | if (rc) |
765 | return rc; | |
766 | } | |
767 | ||
a93192a5 AB |
768 | rc = rdev->rswitch->add_entry(rdev->net->hport, rdev->destid, |
769 | rdev->hopcount, table, | |
770 | route_destid, route_port); | |
818a04a0 | 771 | if (lock) |
a93192a5 AB |
772 | rio_unlock_device(rdev->net->hport, rdev->destid, |
773 | rdev->hopcount); | |
818a04a0 AB |
774 | |
775 | return rc; | |
eb188d0e MP |
776 | } |
777 | ||
778 | /** | |
779 | * rio_route_get_entry- Read a route entry in a switch routing table | |
a93192a5 | 780 | * @rdev: RIO device |
eb188d0e MP |
781 | * @table: Routing table ID |
782 | * @route_destid: Destination ID to be routed | |
783 | * @route_port: Pointer to read port number into | |
818a04a0 | 784 | * @lock: lock switch device flag |
eb188d0e MP |
785 | * |
786 | * Calls the switch specific get_entry() method to read a route entry | |
787 | * in a switch. The route table can be specified using the @table | |
788 | * argument if a switch has per port routing tables or the normal | |
789 | * use is to specific all tables (or the global table) by passing | |
790 | * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL | |
791 | * on failure. | |
792 | */ | |
793 | static int | |
a93192a5 | 794 | rio_route_get_entry(struct rio_dev *rdev, u16 table, |
818a04a0 | 795 | u16 route_destid, u8 *route_port, int lock) |
eb188d0e | 796 | { |
818a04a0 AB |
797 | int rc; |
798 | ||
799 | if (lock) { | |
a93192a5 AB |
800 | rc = rio_lock_device(rdev->net->hport, rdev->destid, |
801 | rdev->hopcount, 1000); | |
818a04a0 AB |
802 | if (rc) |
803 | return rc; | |
804 | } | |
805 | ||
a93192a5 AB |
806 | rc = rdev->rswitch->get_entry(rdev->net->hport, rdev->destid, |
807 | rdev->hopcount, table, | |
808 | route_destid, route_port); | |
818a04a0 | 809 | if (lock) |
a93192a5 AB |
810 | rio_unlock_device(rdev->net->hport, rdev->destid, |
811 | rdev->hopcount); | |
818a04a0 AB |
812 | |
813 | return rc; | |
eb188d0e MP |
814 | } |
815 | ||
816 | /** | |
817 | * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device | |
818 | * @port: Master port to send transaction | |
819 | * @hopcount: Number of hops to the device | |
820 | * | |
821 | * Used during enumeration to read the Host Device ID Lock CSR on a | |
822 | * RIO device. Returns the value of the lock register. | |
823 | */ | |
824 | static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) | |
825 | { | |
826 | u32 result; | |
827 | ||
e0423236 | 828 | rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, |
eb188d0e MP |
829 | RIO_HOST_DID_LOCK_CSR, &result); |
830 | ||
831 | return (u16) (result & 0xffff); | |
832 | } | |
833 | ||
eb188d0e MP |
834 | /** |
835 | * rio_enum_peer- Recursively enumerate a RIO network through a master port | |
836 | * @net: RIO network being enumerated | |
837 | * @port: Master port to send transactions | |
838 | * @hopcount: Number of hops into the network | |
68fe4df5 AB |
839 | * @prev: Previous RIO device connected to the enumerated one |
840 | * @prev_port: Port on previous RIO device | |
eb188d0e MP |
841 | * |
842 | * Recursively enumerates a RIO network. Transactions are sent via the | |
843 | * master port passed in @port. | |
844 | */ | |
181a6ff0 | 845 | static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port, |
68fe4df5 | 846 | u8 hopcount, struct rio_dev *prev, int prev_port) |
eb188d0e | 847 | { |
eb188d0e | 848 | struct rio_dev *rdev; |
af84ca38 | 849 | u32 regval; |
eb188d0e MP |
850 | int tmp; |
851 | ||
e274e0ed AB |
852 | if (rio_mport_chk_dev_access(port, |
853 | RIO_ANY_DESTID(port->sys_size), hopcount)) { | |
854 | pr_debug("RIO: device access check failed\n"); | |
855 | return -1; | |
856 | } | |
857 | ||
eb188d0e MP |
858 | if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { |
859 | pr_debug("RIO: PE already discovered by this host\n"); | |
860 | /* | |
861 | * Already discovered by this host. Add it as another | |
af84ca38 | 862 | * link to the existing device. |
eb188d0e | 863 | */ |
af84ca38 AB |
864 | rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), |
865 | hopcount, RIO_COMPONENT_TAG_CSR, ®val); | |
866 | ||
867 | if (regval) { | |
868 | rdev = rio_get_comptag((regval & 0xffff), NULL); | |
869 | ||
870 | if (rdev && prev && rio_is_switch(prev)) { | |
871 | pr_debug("RIO: redundant path to %s\n", | |
872 | rio_name(rdev)); | |
873 | prev->rswitch->nextdev[prev_port] = rdev; | |
874 | } | |
875 | } | |
876 | ||
eb188d0e MP |
877 | return 0; |
878 | } | |
879 | ||
880 | /* Attempt to acquire device lock */ | |
e0423236 ZW |
881 | rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), |
882 | hopcount, | |
eb188d0e MP |
883 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); |
884 | while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) | |
885 | < port->host_deviceid) { | |
886 | /* Delay a bit */ | |
887 | mdelay(1); | |
888 | /* Attempt to acquire device lock again */ | |
e0423236 ZW |
889 | rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), |
890 | hopcount, | |
eb188d0e MP |
891 | RIO_HOST_DID_LOCK_CSR, |
892 | port->host_deviceid); | |
893 | } | |
894 | ||
895 | if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { | |
896 | pr_debug( | |
897 | "RIO: PE locked by a higher priority host...retreating\n"); | |
898 | return -1; | |
899 | } | |
900 | ||
901 | /* Setup new RIO device */ | |
e0423236 ZW |
902 | rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size), |
903 | hopcount, 1); | |
904 | if (rdev) { | |
eb188d0e MP |
905 | /* Add device to the global and bus/net specific list. */ |
906 | list_add_tail(&rdev->net_list, &net->devices); | |
68fe4df5 AB |
907 | rdev->prev = prev; |
908 | if (prev && rio_is_switch(prev)) | |
909 | prev->rswitch->nextdev[prev_port] = rdev; | |
eb188d0e MP |
910 | } else |
911 | return -1; | |
912 | ||
913 | if (rio_is_switch(rdev)) { | |
de74e00a AB |
914 | int sw_destid; |
915 | int cur_destid; | |
916 | int sw_inport; | |
917 | u16 destid; | |
918 | int port_num; | |
919 | ||
ae05cbd5 | 920 | sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo); |
a93192a5 | 921 | rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, |
818a04a0 | 922 | port->host_deviceid, sw_inport, 0); |
c70555b0 | 923 | rdev->rswitch->route_table[port->host_deviceid] = sw_inport; |
eb188d0e | 924 | |
de74e00a AB |
925 | destid = rio_destid_first(net); |
926 | while (destid != RIO_INVALID_DESTID && destid < next_destid) { | |
927 | if (destid != port->host_deviceid) { | |
928 | rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, | |
929 | destid, sw_inport, 0); | |
930 | rdev->rswitch->route_table[destid] = sw_inport; | |
931 | } | |
932 | destid = rio_destid_next(net, destid + 1); | |
eb188d0e | 933 | } |
eb188d0e MP |
934 | pr_debug( |
935 | "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", | |
68fe4df5 AB |
936 | rio_name(rdev), rdev->vid, rdev->did, |
937 | RIO_GET_TOTAL_PORTS(rdev->swpinfo)); | |
c70555b0 | 938 | sw_destid = next_destid; |
68fe4df5 AB |
939 | for (port_num = 0; |
940 | port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); | |
941 | port_num++) { | |
8d4630dc AB |
942 | if (sw_inport == port_num) { |
943 | rio_enable_rx_tx_port(port, 0, | |
933af4a6 TM |
944 | RIO_ANY_DESTID(port->sys_size), |
945 | hopcount, port_num); | |
e5cabeb3 | 946 | rdev->rswitch->port_ok |= (1 << port_num); |
eb188d0e | 947 | continue; |
e5cabeb3 | 948 | } |
eb188d0e MP |
949 | |
950 | cur_destid = next_destid; | |
951 | ||
952 | if (rio_sport_is_active | |
e0423236 ZW |
953 | (port, RIO_ANY_DESTID(port->sys_size), hopcount, |
954 | port_num)) { | |
eb188d0e MP |
955 | pr_debug( |
956 | "RIO: scanning device on port %d\n", | |
957 | port_num); | |
8d4630dc AB |
958 | rio_enable_rx_tx_port(port, 0, |
959 | RIO_ANY_DESTID(port->sys_size), | |
960 | hopcount, port_num); | |
e5cabeb3 | 961 | rdev->rswitch->port_ok |= (1 << port_num); |
a93192a5 | 962 | rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, |
e0423236 | 963 | RIO_ANY_DESTID(port->sys_size), |
818a04a0 | 964 | port_num, 0); |
eb188d0e | 965 | |
68fe4df5 AB |
966 | if (rio_enum_peer(net, port, hopcount + 1, |
967 | rdev, port_num) < 0) | |
eb188d0e MP |
968 | return -1; |
969 | ||
970 | /* Update routing tables */ | |
de74e00a AB |
971 | destid = rio_destid_next(net, cur_destid + 1); |
972 | if (destid != RIO_INVALID_DESTID) { | |
eb188d0e | 973 | for (destid = cur_destid; |
de74e00a AB |
974 | destid < next_destid;) { |
975 | if (destid != port->host_deviceid) { | |
976 | rio_route_add_entry(rdev, | |
eb188d0e MP |
977 | RIO_GLOBAL_TABLE, |
978 | destid, | |
818a04a0 AB |
979 | port_num, |
980 | 0); | |
de74e00a AB |
981 | rdev->rswitch-> |
982 | route_table[destid] = | |
983 | port_num; | |
984 | } | |
985 | destid = rio_destid_next(net, | |
986 | destid + 1); | |
eb188d0e | 987 | } |
eb188d0e | 988 | } |
e5cabeb3 AB |
989 | } else { |
990 | /* If switch supports Error Management, | |
991 | * set PORT_LOCKOUT bit for unused port | |
992 | */ | |
993 | if (rdev->em_efptr) | |
994 | rio_set_port_lockout(rdev, port_num, 1); | |
995 | ||
996 | rdev->rswitch->port_ok &= ~(1 << port_num); | |
eb188d0e MP |
997 | } |
998 | } | |
c70555b0 | 999 | |
e5cabeb3 AB |
1000 | /* Direct Port-write messages to the enumeratiing host */ |
1001 | if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) && | |
1002 | (rdev->em_efptr)) { | |
1003 | rio_write_config_32(rdev, | |
1004 | rdev->em_efptr + RIO_EM_PW_TGT_DEVID, | |
1005 | (port->host_deviceid << 16) | | |
1006 | (port->sys_size << 15)); | |
1007 | } | |
1008 | ||
1009 | rio_init_em(rdev); | |
1010 | ||
c70555b0 | 1011 | /* Check for empty switch */ |
de74e00a AB |
1012 | if (next_destid == sw_destid) |
1013 | next_destid = rio_destid_alloc(net); | |
c70555b0 | 1014 | |
a93192a5 | 1015 | rdev->destid = sw_destid; |
eb188d0e MP |
1016 | } else |
1017 | pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", | |
1018 | rio_name(rdev), rdev->vid, rdev->did); | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | /** | |
1024 | * rio_enum_complete- Tests if enumeration of a network is complete | |
1025 | * @port: Master port to send transaction | |
1026 | * | |
a571259f | 1027 | * Tests the PGCCSR discovered bit for non-zero value (enumeration |
e5cabeb3 | 1028 | * complete flag). Return %1 if enumeration is complete or %0 if |
eb188d0e MP |
1029 | * enumeration is incomplete. |
1030 | */ | |
1031 | static int rio_enum_complete(struct rio_mport *port) | |
1032 | { | |
af84ca38 | 1033 | u32 regval; |
eb188d0e | 1034 | |
af84ca38 AB |
1035 | rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR, |
1036 | ®val); | |
a571259f | 1037 | return (regval & RIO_PORT_GEN_DISCOVERED) ? 1 : 0; |
eb188d0e MP |
1038 | } |
1039 | ||
1040 | /** | |
1041 | * rio_disc_peer- Recursively discovers a RIO network through a master port | |
1042 | * @net: RIO network being discovered | |
1043 | * @port: Master port to send transactions | |
1044 | * @destid: Current destination ID in network | |
1045 | * @hopcount: Number of hops into the network | |
9b310acc RD |
1046 | * @prev: previous rio_dev |
1047 | * @prev_port: previous port number | |
eb188d0e MP |
1048 | * |
1049 | * Recursively discovers a RIO network. Transactions are sent via the | |
1050 | * master port passed in @port. | |
1051 | */ | |
181a6ff0 | 1052 | static int __devinit |
eb188d0e | 1053 | rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, |
17e96205 | 1054 | u8 hopcount, struct rio_dev *prev, int prev_port) |
eb188d0e MP |
1055 | { |
1056 | u8 port_num, route_port; | |
eb188d0e MP |
1057 | struct rio_dev *rdev; |
1058 | u16 ndestid; | |
1059 | ||
1060 | /* Setup new RIO device */ | |
1061 | if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { | |
1062 | /* Add device to the global and bus/net specific list. */ | |
1063 | list_add_tail(&rdev->net_list, &net->devices); | |
17e96205 AB |
1064 | rdev->prev = prev; |
1065 | if (prev && rio_is_switch(prev)) | |
1066 | prev->rswitch->nextdev[prev_port] = rdev; | |
eb188d0e MP |
1067 | } else |
1068 | return -1; | |
1069 | ||
1070 | if (rio_is_switch(rdev)) { | |
eb188d0e | 1071 | /* Associated destid is how we accessed this switch */ |
a93192a5 | 1072 | rdev->destid = destid; |
eb188d0e | 1073 | |
eb188d0e MP |
1074 | pr_debug( |
1075 | "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", | |
68fe4df5 AB |
1076 | rio_name(rdev), rdev->vid, rdev->did, |
1077 | RIO_GET_TOTAL_PORTS(rdev->swpinfo)); | |
1078 | for (port_num = 0; | |
1079 | port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); | |
1080 | port_num++) { | |
ae05cbd5 | 1081 | if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num) |
eb188d0e MP |
1082 | continue; |
1083 | ||
1084 | if (rio_sport_is_active | |
1085 | (port, destid, hopcount, port_num)) { | |
1086 | pr_debug( | |
1087 | "RIO: scanning device on port %d\n", | |
1088 | port_num); | |
818a04a0 AB |
1089 | |
1090 | rio_lock_device(port, destid, hopcount, 1000); | |
1091 | ||
e0423236 ZW |
1092 | for (ndestid = 0; |
1093 | ndestid < RIO_ANY_DESTID(port->sys_size); | |
eb188d0e | 1094 | ndestid++) { |
a93192a5 | 1095 | rio_route_get_entry(rdev, |
eb188d0e MP |
1096 | RIO_GLOBAL_TABLE, |
1097 | ndestid, | |
818a04a0 | 1098 | &route_port, 0); |
eb188d0e MP |
1099 | if (route_port == port_num) |
1100 | break; | |
1101 | } | |
1102 | ||
af84ca38 AB |
1103 | if (ndestid == RIO_ANY_DESTID(port->sys_size)) |
1104 | continue; | |
818a04a0 | 1105 | rio_unlock_device(port, destid, hopcount); |
17e96205 AB |
1106 | if (rio_disc_peer(net, port, ndestid, |
1107 | hopcount + 1, rdev, port_num) < 0) | |
eb188d0e MP |
1108 | return -1; |
1109 | } | |
1110 | } | |
1111 | } else | |
1112 | pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", | |
1113 | rio_name(rdev), rdev->vid, rdev->did); | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * rio_mport_is_active- Tests if master port link is active | |
1120 | * @port: Master port to test | |
1121 | * | |
1122 | * Reads the port error status CSR for the master port to | |
1123 | * determine if the port has an active link. Returns | |
e5cabeb3 | 1124 | * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active |
eb188d0e MP |
1125 | * or %0 if it is inactive. |
1126 | */ | |
1127 | static int rio_mport_is_active(struct rio_mport *port) | |
1128 | { | |
1129 | u32 result = 0; | |
1130 | u32 ext_ftr_ptr; | |
1131 | int *entry = rio_mport_phys_table; | |
1132 | ||
1133 | do { | |
1134 | if ((ext_ftr_ptr = | |
1135 | rio_mport_get_feature(port, 1, 0, 0, *entry))) | |
1136 | break; | |
1137 | } while (*++entry >= 0); | |
1138 | ||
1139 | if (ext_ftr_ptr) | |
1140 | rio_local_read_config_32(port, | |
1141 | ext_ftr_ptr + | |
1142 | RIO_PORT_N_ERR_STS_CSR(port->index), | |
1143 | &result); | |
1144 | ||
e5cabeb3 | 1145 | return result & RIO_PORT_N_ERR_STS_PORT_OK; |
eb188d0e MP |
1146 | } |
1147 | ||
1148 | /** | |
1149 | * rio_alloc_net- Allocate and configure a new RIO network | |
1150 | * @port: Master port associated with the RIO network | |
de74e00a AB |
1151 | * @do_enum: Enumeration/Discovery mode flag |
1152 | * @start: logical minimal start id for new net | |
eb188d0e MP |
1153 | * |
1154 | * Allocates a RIO network structure, initializes per-network | |
1155 | * list heads, and adds the associated master port to the | |
1156 | * network list of associated master ports. Returns a | |
1157 | * RIO network pointer on success or %NULL on failure. | |
1158 | */ | |
de74e00a AB |
1159 | static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port, |
1160 | int do_enum, u16 start) | |
eb188d0e MP |
1161 | { |
1162 | struct rio_net *net; | |
1163 | ||
dd00cc48 | 1164 | net = kzalloc(sizeof(struct rio_net), GFP_KERNEL); |
de74e00a AB |
1165 | if (net && do_enum) { |
1166 | net->destid_table.table = kzalloc( | |
1167 | BITS_TO_LONGS(RIO_MAX_ROUTE_ENTRIES(port->sys_size)) * | |
1168 | sizeof(long), | |
1169 | GFP_KERNEL); | |
1170 | ||
1171 | if (net->destid_table.table == NULL) { | |
1172 | pr_err("RIO: failed to allocate destID table\n"); | |
1173 | kfree(net); | |
1174 | net = NULL; | |
1175 | } else { | |
1176 | net->destid_table.start = start; | |
1177 | net->destid_table.next = 0; | |
1178 | net->destid_table.max = | |
1179 | RIO_MAX_ROUTE_ENTRIES(port->sys_size); | |
1180 | spin_lock_init(&net->destid_table.lock); | |
1181 | } | |
1182 | } | |
1183 | ||
eb188d0e | 1184 | if (net) { |
eb188d0e MP |
1185 | INIT_LIST_HEAD(&net->node); |
1186 | INIT_LIST_HEAD(&net->devices); | |
a7071efc | 1187 | INIT_LIST_HEAD(&net->switches); |
eb188d0e MP |
1188 | INIT_LIST_HEAD(&net->mports); |
1189 | list_add_tail(&port->nnode, &net->mports); | |
1190 | net->hport = port; | |
005842ef | 1191 | net->id = port->id; |
eb188d0e MP |
1192 | } |
1193 | return net; | |
1194 | } | |
1195 | ||
c70555b0 AB |
1196 | /** |
1197 | * rio_update_route_tables- Updates route tables in switches | |
a7071efc | 1198 | * @net: RIO network to run update on |
c70555b0 AB |
1199 | * |
1200 | * For each enumerated device, ensure that each switch in a system | |
1201 | * has correct routing entries. Add routes for devices that where | |
1202 | * unknown dirung the first enumeration pass through the switch. | |
1203 | */ | |
a7071efc | 1204 | static void rio_update_route_tables(struct rio_net *net) |
c70555b0 | 1205 | { |
ded05782 | 1206 | struct rio_dev *rdev, *swrdev; |
c70555b0 AB |
1207 | struct rio_switch *rswitch; |
1208 | u8 sport; | |
1209 | u16 destid; | |
1210 | ||
a7071efc | 1211 | list_for_each_entry(rdev, &net->devices, net_list) { |
c70555b0 | 1212 | |
a93192a5 | 1213 | destid = rdev->destid; |
c70555b0 | 1214 | |
a7071efc | 1215 | list_for_each_entry(rswitch, &net->switches, node) { |
c70555b0 AB |
1216 | |
1217 | if (rio_is_switch(rdev) && (rdev->rswitch == rswitch)) | |
1218 | continue; | |
1219 | ||
1220 | if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) { | |
ded05782 AB |
1221 | swrdev = sw_to_rio_dev(rswitch); |
1222 | ||
07590ff0 | 1223 | /* Skip if destid ends in empty switch*/ |
ded05782 | 1224 | if (swrdev->destid == destid) |
07590ff0 | 1225 | continue; |
c70555b0 | 1226 | |
ded05782 | 1227 | sport = RIO_GET_PORT_NUM(swrdev->swpinfo); |
c70555b0 AB |
1228 | |
1229 | if (rswitch->add_entry) { | |
ded05782 | 1230 | rio_route_add_entry(swrdev, |
818a04a0 AB |
1231 | RIO_GLOBAL_TABLE, destid, |
1232 | sport, 0); | |
c70555b0 AB |
1233 | rswitch->route_table[destid] = sport; |
1234 | } | |
1235 | } | |
1236 | } | |
1237 | } | |
1238 | } | |
1239 | ||
e5cabeb3 AB |
1240 | /** |
1241 | * rio_init_em - Initializes RIO Error Management (for switches) | |
97ef6f74 | 1242 | * @rdev: RIO device |
e5cabeb3 AB |
1243 | * |
1244 | * For each enumerated switch, call device-specific error management | |
1245 | * initialization routine (if supplied by the switch driver). | |
1246 | */ | |
1247 | static void rio_init_em(struct rio_dev *rdev) | |
1248 | { | |
1249 | if (rio_is_switch(rdev) && (rdev->em_efptr) && | |
1250 | (rdev->rswitch->em_init)) { | |
1251 | rdev->rswitch->em_init(rdev); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | /** | |
1256 | * rio_pw_enable - Enables/disables port-write handling by a master port | |
1257 | * @port: Master port associated with port-write handling | |
1258 | * @enable: 1=enable, 0=disable | |
1259 | */ | |
1260 | static void rio_pw_enable(struct rio_mport *port, int enable) | |
1261 | { | |
1262 | if (port->ops->pwenable) | |
1263 | port->ops->pwenable(port, enable); | |
1264 | } | |
1265 | ||
eb188d0e MP |
1266 | /** |
1267 | * rio_enum_mport- Start enumeration through a master port | |
1268 | * @mport: Master port to send transactions | |
1269 | * | |
1270 | * Starts the enumeration process. If somebody has enumerated our | |
1271 | * master port device, then give up. If not and we have an active | |
1272 | * link, then start recursive peer enumeration. Returns %0 if | |
1273 | * enumeration succeeds or %-EBUSY if enumeration fails. | |
1274 | */ | |
37d33d15 | 1275 | int __devinit rio_enum_mport(struct rio_mport *mport) |
eb188d0e MP |
1276 | { |
1277 | struct rio_net *net = NULL; | |
1278 | int rc = 0; | |
1279 | ||
1280 | printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, | |
1281 | mport->name); | |
1282 | /* If somebody else enumerated our master port device, bail. */ | |
1283 | if (rio_enum_host(mport) < 0) { | |
1284 | printk(KERN_INFO | |
1285 | "RIO: master port %d device has been enumerated by a remote host\n", | |
1286 | mport->id); | |
1287 | rc = -EBUSY; | |
1288 | goto out; | |
1289 | } | |
1290 | ||
1291 | /* If master port has an active link, allocate net and enum peers */ | |
1292 | if (rio_mport_is_active(mport)) { | |
de74e00a AB |
1293 | net = rio_alloc_net(mport, 1, 0); |
1294 | if (!net) { | |
eb188d0e MP |
1295 | printk(KERN_ERR "RIO: failed to allocate new net\n"); |
1296 | rc = -ENOMEM; | |
1297 | goto out; | |
1298 | } | |
933af4a6 | 1299 | |
de74e00a AB |
1300 | /* reserve mport destID in new net */ |
1301 | rio_destid_reserve(net, mport->host_deviceid); | |
1302 | ||
933af4a6 TM |
1303 | /* Enable Input Output Port (transmitter reviever) */ |
1304 | rio_enable_rx_tx_port(mport, 1, 0, 0, 0); | |
1305 | ||
af84ca38 AB |
1306 | /* Set component tag for host */ |
1307 | rio_local_write_config_32(mport, RIO_COMPONENT_TAG_CSR, | |
1308 | next_comptag++); | |
1309 | ||
de74e00a AB |
1310 | next_destid = rio_destid_alloc(net); |
1311 | ||
68fe4df5 | 1312 | if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) { |
eb188d0e MP |
1313 | /* A higher priority host won enumeration, bail. */ |
1314 | printk(KERN_INFO | |
1315 | "RIO: master port %d device has lost enumeration to a remote host\n", | |
1316 | mport->id); | |
a7071efc | 1317 | rio_clear_locks(net); |
eb188d0e MP |
1318 | rc = -EBUSY; |
1319 | goto out; | |
1320 | } | |
de74e00a AB |
1321 | /* free the last allocated destID (unused) */ |
1322 | rio_destid_free(net, next_destid); | |
a7071efc AB |
1323 | rio_update_route_tables(net); |
1324 | rio_clear_locks(net); | |
e5cabeb3 | 1325 | rio_pw_enable(mport, 1); |
eb188d0e MP |
1326 | } else { |
1327 | printk(KERN_INFO "RIO: master port %d link inactive\n", | |
1328 | mport->id); | |
1329 | rc = -EINVAL; | |
1330 | } | |
1331 | ||
1332 | out: | |
1333 | return rc; | |
1334 | } | |
1335 | ||
1336 | /** | |
1337 | * rio_build_route_tables- Generate route tables from switch route entries | |
a7071efc | 1338 | * @net: RIO network to run route tables scan on |
eb188d0e MP |
1339 | * |
1340 | * For each switch device, generate a route table by copying existing | |
1341 | * route entries from the switch. | |
1342 | */ | |
a7071efc | 1343 | static void rio_build_route_tables(struct rio_net *net) |
eb188d0e | 1344 | { |
a7071efc | 1345 | struct rio_switch *rswitch; |
eb188d0e MP |
1346 | struct rio_dev *rdev; |
1347 | int i; | |
1348 | u8 sport; | |
1349 | ||
a7071efc AB |
1350 | list_for_each_entry(rswitch, &net->switches, node) { |
1351 | rdev = sw_to_rio_dev(rswitch); | |
818a04a0 | 1352 | |
a7071efc AB |
1353 | rio_lock_device(net->hport, rdev->destid, |
1354 | rdev->hopcount, 1000); | |
1355 | for (i = 0; | |
1356 | i < RIO_MAX_ROUTE_ENTRIES(net->hport->sys_size); | |
1357 | i++) { | |
1358 | if (rio_route_get_entry(rdev, RIO_GLOBAL_TABLE, | |
1359 | i, &sport, 0) < 0) | |
1360 | continue; | |
1361 | rswitch->route_table[i] = sport; | |
eb188d0e | 1362 | } |
a7071efc AB |
1363 | |
1364 | rio_unlock_device(net->hport, rdev->destid, rdev->hopcount); | |
1365 | } | |
eb188d0e MP |
1366 | } |
1367 | ||
eb188d0e MP |
1368 | /** |
1369 | * rio_disc_mport- Start discovery through a master port | |
1370 | * @mport: Master port to send transactions | |
1371 | * | |
1372 | * Starts the discovery process. If we have an active link, | |
1373 | * then wait for the signal that enumeration is complete. | |
1374 | * When enumeration completion is signaled, start recursive | |
1375 | * peer discovery. Returns %0 if discovery succeeds or %-EBUSY | |
1376 | * on failure. | |
1377 | */ | |
37d33d15 | 1378 | int __devinit rio_disc_mport(struct rio_mport *mport) |
eb188d0e MP |
1379 | { |
1380 | struct rio_net *net = NULL; | |
fa3dbaa0 | 1381 | unsigned long to_end; |
eb188d0e MP |
1382 | |
1383 | printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id, | |
1384 | mport->name); | |
1385 | ||
1386 | /* If master port has an active link, allocate net and discover peers */ | |
1387 | if (rio_mport_is_active(mport)) { | |
fa3dbaa0 | 1388 | pr_debug("RIO: wait for enumeration to complete...\n"); |
eb188d0e | 1389 | |
fa3dbaa0 AB |
1390 | to_end = jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; |
1391 | while (time_before(jiffies, to_end)) { | |
1392 | if (rio_enum_complete(mport)) | |
1393 | goto enum_done; | |
f4c9c0e8 | 1394 | msleep(10); |
eb188d0e | 1395 | } |
eb188d0e | 1396 | |
fa3dbaa0 AB |
1397 | pr_debug("RIO: discovery timeout on mport %d %s\n", |
1398 | mport->id, mport->name); | |
1399 | goto bail; | |
1400 | enum_done: | |
1401 | pr_debug("RIO: ... enumeration done\n"); | |
1402 | ||
de74e00a | 1403 | net = rio_alloc_net(mport, 0, 0); |
fa3dbaa0 AB |
1404 | if (!net) { |
1405 | printk(KERN_ERR "RIO: Failed to allocate new net\n"); | |
1406 | goto bail; | |
1407 | } | |
818a04a0 AB |
1408 | |
1409 | /* Read DestID assigned by enumerator */ | |
1410 | rio_local_read_config_32(mport, RIO_DID_CSR, | |
1411 | &mport->host_deviceid); | |
1412 | mport->host_deviceid = RIO_GET_DID(mport->sys_size, | |
1413 | mport->host_deviceid); | |
1414 | ||
e0423236 | 1415 | if (rio_disc_peer(net, mport, RIO_ANY_DESTID(mport->sys_size), |
17e96205 | 1416 | 0, NULL, 0) < 0) { |
eb188d0e MP |
1417 | printk(KERN_INFO |
1418 | "RIO: master port %d device has failed discovery\n", | |
1419 | mport->id); | |
1420 | goto bail; | |
1421 | } | |
1422 | ||
a7071efc | 1423 | rio_build_route_tables(net); |
eb188d0e MP |
1424 | } |
1425 | ||
1426 | return 0; | |
fa3dbaa0 | 1427 | bail: |
eb188d0e MP |
1428 | return -EBUSY; |
1429 | } |