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