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