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