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