blob: 272543a42a43b0478caf4879c3664782790bafc2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IEEE 1394 for Linux
3 *
4 * Copyright (C) 1999 Andreas E. Bombe
5 *
6 * This code is licensed under the GPL. See the file COPYING in the root
7 * directory of the kernel sources for details.
8 *
9 *
10 * Contributions:
11 *
12 * Christian Toegel <christian.toegel@gmx.at>
13 * unregister address space
14 *
15 * Manfred Weihs <weihs@ict.tuwien.ac.at>
16 * unregister address space
17 *
18 */
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/slab.h>
21#include <linux/list.h>
22#include <linux/bitops.h>
23
24#include "ieee1394.h"
25#include "ieee1394_types.h"
26#include "hosts.h"
27#include "ieee1394_core.h"
28#include "highlevel.h"
29#include "nodemgr.h"
30
31
32struct hl_host_info {
33 struct list_head list;
34 struct hpsb_host *host;
35 size_t size;
36 unsigned long key;
37 void *data;
38};
39
40
41static LIST_HEAD(hl_drivers);
42static DECLARE_RWSEM(hl_drivers_sem);
43
44static LIST_HEAD(hl_irqs);
45static DEFINE_RWLOCK(hl_irqs_lock);
46
47static DEFINE_RWLOCK(addr_space_lock);
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
Ben Collins2c4b69b2006-06-12 18:16:16 -040051 struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
53 struct hl_host_info *hi = NULL;
54
55 if (!hl || !host)
56 return NULL;
57
58 read_lock(&hl->host_info_lock);
59 list_for_each_entry(hi, &hl->host_info_list, list) {
60 if (hi->host == host) {
61 read_unlock(&hl->host_info_lock);
62 return hi;
63 }
64 }
65 read_unlock(&hl->host_info_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 return NULL;
67}
68
Stefan Richterafd65462007-03-05 03:06:23 +010069/**
70 * hpsb_get_hostinfo - retrieve a hostinfo pointer bound to this driver/host
71 *
72 * Returns a per @host and @hl driver data structure that was previously stored
73 * by hpsb_create_hostinfo.
74 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070075void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
76{
77 struct hl_host_info *hi = hl_get_hostinfo(hl, host);
78
Ben Collins2c4b69b2006-06-12 18:16:16 -040079 return hi ? hi->data : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080}
81
Stefan Richterafd65462007-03-05 03:06:23 +010082/**
83 * hpsb_create_hostinfo - allocate a hostinfo pointer bound to this driver/host
84 *
85 * Allocate a hostinfo pointer backed by memory with @data_size and bind it to
86 * to this @hl driver and @host. If @data_size is zero, then the return here is
87 * only valid for error checking.
88 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070089void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
90 size_t data_size)
91{
92 struct hl_host_info *hi;
93 void *data;
94 unsigned long flags;
95
96 hi = hl_get_hostinfo(hl, host);
97 if (hi) {
Ben Collins2c4b69b2006-06-12 18:16:16 -040098 HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already"
99 " exists", hl->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 return NULL;
101 }
102
Stefan Richter85511582005-11-07 06:31:45 -0500103 hi = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 if (!hi)
105 return NULL;
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 if (data_size) {
108 data = hi->data = hi + 1;
109 hi->size = data_size;
110 } else
111 data = hi;
112
113 hi->host = host;
114
115 write_lock_irqsave(&hl->host_info_lock, flags);
116 list_add_tail(&hi->list, &hl->host_info_list);
117 write_unlock_irqrestore(&hl->host_info_lock, flags);
118
119 return data;
120}
121
Stefan Richterafd65462007-03-05 03:06:23 +0100122/**
123 * hpsb_set_hostinfo - set the hostinfo pointer to something useful
124 *
125 * Usually follows a call to hpsb_create_hostinfo, where the size is 0.
126 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
128 void *data)
129{
130 struct hl_host_info *hi;
131
132 hi = hl_get_hostinfo(hl, host);
133 if (hi) {
134 if (!hi->size && !hi->data) {
135 hi->data = data;
136 return 0;
137 } else
Ben Collins2c4b69b2006-06-12 18:16:16 -0400138 HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo "
139 "already has data", hl->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 } else
141 HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
142 hl->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 return -EINVAL;
144}
145
Stefan Richterafd65462007-03-05 03:06:23 +0100146/**
147 * hpsb_destroy_hostinfo - free and remove a hostinfo pointer
148 *
149 * Free and remove the hostinfo pointer bound to this @hl driver and @host.
150 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
152{
153 struct hl_host_info *hi;
154
155 hi = hl_get_hostinfo(hl, host);
156 if (hi) {
157 unsigned long flags;
158 write_lock_irqsave(&hl->host_info_lock, flags);
159 list_del(&hi->list);
160 write_unlock_irqrestore(&hl->host_info_lock, flags);
161 kfree(hi);
162 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return;
164}
165
Stefan Richterafd65462007-03-05 03:06:23 +0100166/**
167 * hpsb_set_hostinfo_key - set an alternate lookup key for an hostinfo
168 *
169 * Sets an alternate lookup key for the hostinfo bound to this @hl driver and
170 * @host.
171 */
Ben Collins2c4b69b2006-06-12 18:16:16 -0400172void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
173 unsigned long key)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174{
175 struct hl_host_info *hi;
176
177 hi = hl_get_hostinfo(hl, host);
178 if (hi)
179 hi->key = key;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 return;
181}
182
Stefan Richterafd65462007-03-05 03:06:23 +0100183/**
184 * hpsb_get_hostinfo_bykey - retrieve a hostinfo pointer by its alternate key
185 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
187{
188 struct hl_host_info *hi;
189 void *data = NULL;
190
191 if (!hl)
192 return NULL;
193
194 read_lock(&hl->host_info_lock);
195 list_for_each_entry(hi, &hl->host_info_list, list) {
196 if (hi->key == key) {
197 data = hi->data;
198 break;
199 }
200 }
201 read_unlock(&hl->host_info_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 return data;
203}
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data)
206{
207 struct hpsb_highlevel *hl = __data;
208
209 hl->add_host(host);
210
Ben Collins2c4b69b2006-06-12 18:16:16 -0400211 if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0)
212 HPSB_ERR("Failed to generate Configuration ROM image for host "
213 "%s-%d", hl->name, host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 return 0;
215}
216
Stefan Richterafd65462007-03-05 03:06:23 +0100217/**
218 * hpsb_register_highlevel - register highlevel driver
219 *
220 * The name pointer in @hl has to stay valid at all times because the string is
221 * not copied.
222 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223void hpsb_register_highlevel(struct hpsb_highlevel *hl)
224{
Ben Collins44515192006-06-12 18:16:01 -0400225 unsigned long flags;
226
Stefan Richter055a7da2008-05-19 22:07:28 +0200227 hpsb_init_highlevel(hl);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400228 INIT_LIST_HEAD(&hl->addr_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
230 down_write(&hl_drivers_sem);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400231 list_add_tail(&hl->hl_list, &hl_drivers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 up_write(&hl_drivers_sem);
233
Ben Collins44515192006-06-12 18:16:01 -0400234 write_lock_irqsave(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 list_add_tail(&hl->irq_list, &hl_irqs);
Ben Collins44515192006-06-12 18:16:01 -0400236 write_unlock_irqrestore(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238 if (hl->add_host)
239 nodemgr_for_each_host(hl, highlevel_for_each_host_reg);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400240 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
243static void __delete_addr(struct hpsb_address_serve *as)
244{
245 list_del(&as->host_list);
246 list_del(&as->hl_list);
247 kfree(as);
248}
249
Ben Collins2c4b69b2006-06-12 18:16:16 -0400250static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host,
251 int update_cr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
253 unsigned long flags;
254 struct list_head *lh, *next;
255 struct hpsb_address_serve *as;
256
257 /* First, let the highlevel driver unreg */
258 if (hl->remove_host)
259 hl->remove_host(host);
260
261 /* Remove any addresses that are matched for this highlevel driver
262 * and this particular host. */
263 write_lock_irqsave(&addr_space_lock, flags);
264 list_for_each_safe (lh, next, &hl->addr_list) {
265 as = list_entry(lh, struct hpsb_address_serve, hl_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 if (as->host == host)
267 __delete_addr(as);
268 }
269 write_unlock_irqrestore(&addr_space_lock, flags);
270
271 /* Now update the config-rom to reflect anything removed by the
272 * highlevel driver. */
Ben Collins2c4b69b2006-06-12 18:16:16 -0400273 if (update_cr && host->update_config_rom &&
274 hpsb_update_config_rom_image(host) < 0)
275 HPSB_ERR("Failed to generate Configuration ROM image for host "
276 "%s-%d", hl->name, host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Ben Collins2c4b69b2006-06-12 18:16:16 -0400278 /* Finally remove all the host info associated between these two. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 hpsb_destroy_hostinfo(hl, host);
280}
281
282static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data)
283{
284 struct hpsb_highlevel *hl = __data;
285
286 __unregister_host(hl, host, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return 0;
288}
289
Stefan Richterafd65462007-03-05 03:06:23 +0100290/**
291 * hpsb_unregister_highlevel - unregister highlevel driver
292 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
294{
Ben Collins44515192006-06-12 18:16:01 -0400295 unsigned long flags;
296
297 write_lock_irqsave(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 list_del(&hl->irq_list);
Ben Collins44515192006-06-12 18:16:01 -0400299 write_unlock_irqrestore(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301 down_write(&hl_drivers_sem);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400302 list_del(&hl->hl_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 up_write(&hl_drivers_sem);
304
305 nodemgr_for_each_host(hl, highlevel_for_each_host_unreg);
306}
307
Stefan Richterafd65462007-03-05 03:06:23 +0100308/**
309 * hpsb_allocate_and_register_addrspace - alloc' and reg' a host address space
310 *
311 * @start and @end are 48 bit pointers and have to be quadlet aligned.
312 * @end points to the first address behind the handled addresses. This
313 * function can be called multiple times for a single hpsb_highlevel @hl to
314 * implement sparse register sets. The requested region must not overlap any
315 * previously allocated region, otherwise registering will fail.
316 *
317 * It returns true for successful allocation. Address spaces can be
318 * unregistered with hpsb_unregister_addrspace. All remaining address spaces
319 * are automatically deallocated together with the hpsb_highlevel @hl.
320 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
322 struct hpsb_host *host,
323 struct hpsb_address_ops *ops,
324 u64 size, u64 alignment,
325 u64 start, u64 end)
326{
327 struct hpsb_address_serve *as, *a1, *a2;
328 struct list_head *entry;
Ben Collins67372312006-06-12 18:15:31 -0400329 u64 retval = CSR1212_INVALID_ADDR_SPACE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 unsigned long flags;
331 u64 align_mask = ~(alignment - 1);
332
333 if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
Akinobu Mita37d54112006-03-26 01:39:56 -0800334 (hweight64(alignment) != 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 HPSB_ERR("%s called with invalid alignment: 0x%048llx",
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -0800336 __func__, (unsigned long long)alignment);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 return retval;
338 }
339
Ben Collins8aef63f2006-06-12 18:13:21 -0400340 /* default range,
341 * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */
Ben Collins67372312006-06-12 18:15:31 -0400342 if (start == CSR1212_INVALID_ADDR_SPACE &&
343 end == CSR1212_INVALID_ADDR_SPACE) {
Ben Collins8aef63f2006-06-12 18:13:21 -0400344 start = host->middle_addr_space;
Ben Collins67372312006-06-12 18:15:31 -0400345 end = CSR1212_ALL_SPACE_END;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 }
347
Ben Collins2c4b69b2006-06-12 18:16:16 -0400348 if (((start|end) & ~align_mask) || (start >= end) ||
349 (end > CSR1212_ALL_SPACE_END)) {
350 HPSB_ERR("%s called with invalid addresses "
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -0800351 "(start = %012Lx end = %012Lx)", __func__,
Ben Collins2c4b69b2006-06-12 18:16:16 -0400352 (unsigned long long)start,(unsigned long long)end);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 return retval;
354 }
355
Stefan Richter85511582005-11-07 06:31:45 -0500356 as = kmalloc(sizeof(*as), GFP_KERNEL);
357 if (!as)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360 INIT_LIST_HEAD(&as->host_list);
361 INIT_LIST_HEAD(&as->hl_list);
362 as->op = ops;
363 as->host = host;
364
365 write_lock_irqsave(&addr_space_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 list_for_each(entry, &host->addr_space) {
367 u64 a1sa, a1ea;
368 u64 a2sa, a2ea;
369
370 a1 = list_entry(entry, struct hpsb_address_serve, host_list);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400371 a2 = list_entry(entry->next, struct hpsb_address_serve,
372 host_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 a1sa = a1->start & align_mask;
375 a1ea = (a1->end + alignment -1) & align_mask;
376 a2sa = a2->start & align_mask;
377 a2ea = (a2->end + alignment -1) & align_mask;
378
Ben Collins2c4b69b2006-06-12 18:16:16 -0400379 if ((a2sa - a1ea >= size) && (a2sa - start >= size) &&
380 (a2sa > start)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 as->start = max(start, a1ea);
382 as->end = as->start + size;
383 list_add(&as->host_list, entry);
384 list_add_tail(&as->hl_list, &hl->addr_list);
385 retval = as->start;
386 break;
387 }
388 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 write_unlock_irqrestore(&addr_space_lock, flags);
390
Ben Collins2c4b69b2006-06-12 18:16:16 -0400391 if (retval == CSR1212_INVALID_ADDR_SPACE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 kfree(as);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 return retval;
394}
395
Stefan Richterafd65462007-03-05 03:06:23 +0100396/**
397 * hpsb_register_addrspace - register a host address space
398 *
399 * @start and @end are 48 bit pointers and have to be quadlet aligned.
400 * @end points to the first address behind the handled addresses. This
401 * function can be called multiple times for a single hpsb_highlevel @hl to
402 * implement sparse register sets. The requested region must not overlap any
403 * previously allocated region, otherwise registering will fail.
404 *
405 * It returns true for successful allocation. Address spaces can be
406 * unregistered with hpsb_unregister_addrspace. All remaining address spaces
407 * are automatically deallocated together with the hpsb_highlevel @hl.
408 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
Ben Collins2c4b69b2006-06-12 18:16:16 -0400410 struct hpsb_address_ops *ops, u64 start, u64 end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400412 struct hpsb_address_serve *as;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 struct list_head *lh;
Ben Collins2c4b69b2006-06-12 18:16:16 -0400414 int retval = 0;
415 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Ben Collins2c4b69b2006-06-12 18:16:16 -0400417 if (((start|end) & 3) || (start >= end) ||
418 (end > CSR1212_ALL_SPACE_END)) {
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -0800419 HPSB_ERR("%s called with invalid addresses", __func__);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400420 return 0;
421 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Stefan Richter85511582005-11-07 06:31:45 -0500423 as = kmalloc(sizeof(*as), GFP_ATOMIC);
424 if (!as)
425 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Ben Collins2c4b69b2006-06-12 18:16:16 -0400427 INIT_LIST_HEAD(&as->host_list);
428 INIT_LIST_HEAD(&as->hl_list);
429 as->op = ops;
430 as->start = start;
431 as->end = end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 as->host = host;
433
434 write_lock_irqsave(&addr_space_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 list_for_each(lh, &host->addr_space) {
436 struct hpsb_address_serve *as_this =
437 list_entry(lh, struct hpsb_address_serve, host_list);
438 struct hpsb_address_serve *as_next =
Ben Collins2c4b69b2006-06-12 18:16:16 -0400439 list_entry(lh->next, struct hpsb_address_serve,
440 host_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 if (as_this->end > as->start)
443 break;
444
445 if (as_next->start >= as->end) {
446 list_add(&as->host_list, lh);
447 list_add_tail(&as->hl_list, &hl->addr_list);
448 retval = 1;
449 break;
450 }
451 }
452 write_unlock_irqrestore(&addr_space_lock, flags);
453
454 if (retval == 0)
455 kfree(as);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400456 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457}
458
459int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
Ben Collins2c4b69b2006-06-12 18:16:16 -0400460 u64 start)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400462 int retval = 0;
463 struct hpsb_address_serve *as;
464 struct list_head *lh, *next;
465 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Ben Collins2c4b69b2006-06-12 18:16:16 -0400467 write_lock_irqsave(&addr_space_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 list_for_each_safe (lh, next, &hl->addr_list) {
Ben Collins2c4b69b2006-06-12 18:16:16 -0400469 as = list_entry(lh, struct hpsb_address_serve, hl_list);
470 if (as->start == start && as->host == host) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 __delete_addr(as);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400472 retval = 1;
473 break;
474 }
475 }
476 write_unlock_irqrestore(&addr_space_lock, flags);
477 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
Stefan Richtere47c1fe2008-11-26 01:34:25 +0100480static struct hpsb_address_ops dummy_ops;
481
482/* dummy address spaces as lower and upper bounds of the host's a.s. list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483static void init_hpsb_highlevel(struct hpsb_host *host)
484{
Stefan Richtere47c1fe2008-11-26 01:34:25 +0100485 INIT_LIST_HEAD(&host->dummy_zero_addr.host_list);
486 INIT_LIST_HEAD(&host->dummy_zero_addr.hl_list);
487 INIT_LIST_HEAD(&host->dummy_max_addr.host_list);
488 INIT_LIST_HEAD(&host->dummy_max_addr.hl_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Stefan Richtere47c1fe2008-11-26 01:34:25 +0100490 host->dummy_zero_addr.op = host->dummy_max_addr.op = &dummy_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Stefan Richtere47c1fe2008-11-26 01:34:25 +0100492 host->dummy_zero_addr.start = host->dummy_zero_addr.end = 0;
493 host->dummy_max_addr.start = host->dummy_max_addr.end = ((u64) 1) << 48;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Stefan Richtere47c1fe2008-11-26 01:34:25 +0100495 list_add_tail(&host->dummy_zero_addr.host_list, &host->addr_space);
496 list_add_tail(&host->dummy_max_addr.host_list, &host->addr_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
499void highlevel_add_host(struct hpsb_host *host)
500{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400501 struct hpsb_highlevel *hl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
503 init_hpsb_highlevel(host);
504
505 down_read(&hl_drivers_sem);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400506 list_for_each_entry(hl, &hl_drivers, hl_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 if (hl->add_host)
508 hl->add_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 }
Ben Collins2c4b69b2006-06-12 18:16:16 -0400510 up_read(&hl_drivers_sem);
511 if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0)
512 HPSB_ERR("Failed to generate Configuration ROM image for host "
513 "%s-%d", hl->name, host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514}
515
516void highlevel_remove_host(struct hpsb_host *host)
517{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400518 struct hpsb_highlevel *hl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 down_read(&hl_drivers_sem);
521 list_for_each_entry(hl, &hl_drivers, hl_list)
522 __unregister_host(hl, host, 0);
523 up_read(&hl_drivers_sem);
524}
525
526void highlevel_host_reset(struct hpsb_host *host)
527{
Ben Collins44515192006-06-12 18:16:01 -0400528 unsigned long flags;
Ben Collins2c4b69b2006-06-12 18:16:16 -0400529 struct hpsb_highlevel *hl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
Ben Collins44515192006-06-12 18:16:01 -0400531 read_lock_irqsave(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 list_for_each_entry(hl, &hl_irqs, irq_list) {
Ben Collins2c4b69b2006-06-12 18:16:16 -0400533 if (hl->host_reset)
534 hl->host_reset(host);
535 }
Ben Collins44515192006-06-12 18:16:01 -0400536 read_unlock_irqrestore(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537}
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
540 void *data, size_t length)
541{
Ben Collins44515192006-06-12 18:16:01 -0400542 unsigned long flags;
Ben Collins2c4b69b2006-06-12 18:16:16 -0400543 struct hpsb_highlevel *hl;
544 int cts = ((quadlet_t *)data)[0] >> 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Ben Collins2c4b69b2006-06-12 18:16:16 -0400546 read_lock_irqsave(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 list_for_each_entry(hl, &hl_irqs, irq_list) {
Ben Collins2c4b69b2006-06-12 18:16:16 -0400548 if (hl->fcp_request)
549 hl->fcp_request(host, nodeid, direction, cts, data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 length);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400551 }
552 read_unlock_irqrestore(&hl_irqs_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553}
554
Stefan Richterafd65462007-03-05 03:06:23 +0100555/*
556 * highlevel_read, highlevel_write, highlevel_lock, highlevel_lock64:
557 *
558 * These functions are called to handle transactions. They are called when a
559 * packet arrives. The flags argument contains the second word of the first
560 * header quadlet of the incoming packet (containing transaction label, retry
561 * code, transaction code and priority). These functions either return a
562 * response code or a negative number. In the first case a response will be
563 * generated. In the latter case, no response will be sent and the driver which
564 * handled the request will send the response itself.
565 */
Ben Collins2c4b69b2006-06-12 18:16:16 -0400566int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
567 unsigned int length, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400569 struct hpsb_address_serve *as;
570 unsigned int partlength;
571 int rcode = RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Ben Collins2c4b69b2006-06-12 18:16:16 -0400573 read_lock(&addr_space_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 list_for_each_entry(as, &host->addr_space, host_list) {
575 if (as->start > addr)
576 break;
577
Ben Collins2c4b69b2006-06-12 18:16:16 -0400578 if (as->end > addr) {
579 partlength = min(as->end - addr, (u64) length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Ben Collins2c4b69b2006-06-12 18:16:16 -0400581 if (as->op->read)
582 rcode = as->op->read(host, nodeid, data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 addr, partlength, flags);
Ben Collins2c4b69b2006-06-12 18:16:16 -0400584 else
585 rcode = RCODE_TYPE_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587 data += partlength;
Ben Collins2c4b69b2006-06-12 18:16:16 -0400588 length -= partlength;
589 addr += partlength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Ben Collins2c4b69b2006-06-12 18:16:16 -0400591 if ((rcode != RCODE_COMPLETE) || !length)
592 break;
593 }
594 }
595 read_unlock(&addr_space_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Ben Collins2c4b69b2006-06-12 18:16:16 -0400597 if (length && (rcode == RCODE_COMPLETE))
598 rcode = RCODE_ADDRESS_ERROR;
599 return rcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600}
601
Ben Collins2c4b69b2006-06-12 18:16:16 -0400602int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
603 u64 addr, unsigned int length, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400605 struct hpsb_address_serve *as;
606 unsigned int partlength;
607 int rcode = RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Ben Collins2c4b69b2006-06-12 18:16:16 -0400609 read_lock(&addr_space_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 list_for_each_entry(as, &host->addr_space, host_list) {
611 if (as->start > addr)
612 break;
613
Ben Collins2c4b69b2006-06-12 18:16:16 -0400614 if (as->end > addr) {
615 partlength = min(as->end - addr, (u64) length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Ben Collins2c4b69b2006-06-12 18:16:16 -0400617 if (as->op->write)
618 rcode = as->op->write(host, nodeid, destid,
619 data, addr, partlength,
620 flags);
621 else
622 rcode = RCODE_TYPE_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624 data += partlength;
Ben Collins2c4b69b2006-06-12 18:16:16 -0400625 length -= partlength;
626 addr += partlength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
Ben Collins2c4b69b2006-06-12 18:16:16 -0400628 if ((rcode != RCODE_COMPLETE) || !length)
629 break;
630 }
631 }
632 read_unlock(&addr_space_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
Ben Collins2c4b69b2006-06-12 18:16:16 -0400634 if (length && (rcode == RCODE_COMPLETE))
635 rcode = RCODE_ADDRESS_ERROR;
636 return rcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637}
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
Ben Collins2c4b69b2006-06-12 18:16:16 -0400640 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
641 u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400643 struct hpsb_address_serve *as;
644 int rcode = RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
Ben Collins2c4b69b2006-06-12 18:16:16 -0400646 read_lock(&addr_space_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 list_for_each_entry(as, &host->addr_space, host_list) {
648 if (as->start > addr)
649 break;
650
Ben Collins2c4b69b2006-06-12 18:16:16 -0400651 if (as->end > addr) {
652 if (as->op->lock)
653 rcode = as->op->lock(host, nodeid, store, addr,
654 data, arg, ext_tcode,
655 flags);
656 else
657 rcode = RCODE_TYPE_ERROR;
658 break;
659 }
660 }
661 read_unlock(&addr_space_lock);
662 return rcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663}
664
665int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
Ben Collins2c4b69b2006-06-12 18:16:16 -0400666 u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
667 u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{
Ben Collins2c4b69b2006-06-12 18:16:16 -0400669 struct hpsb_address_serve *as;
670 int rcode = RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
Ben Collins2c4b69b2006-06-12 18:16:16 -0400672 read_lock(&addr_space_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
674 list_for_each_entry(as, &host->addr_space, host_list) {
675 if (as->start > addr)
676 break;
677
Ben Collins2c4b69b2006-06-12 18:16:16 -0400678 if (as->end > addr) {
679 if (as->op->lock64)
680 rcode = as->op->lock64(host, nodeid, store,
681 addr, data, arg,
682 ext_tcode, flags);
683 else
684 rcode = RCODE_TYPE_ERROR;
685 break;
686 }
687 }
688 read_unlock(&addr_space_lock);
689 return rcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690}