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