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6f354b01 PB |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
8e77af6a | 6 | * Copyright (C) 2005-2006 Silicon Graphics, Inc. All rights reserved. |
6f354b01 PB |
7 | * |
8 | * This work was based on the 2.4/2.6 kernel development by Dick Reigner. | |
9 | * Work to add BIOS PROM support was completed by Mike Habeck. | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/pci.h> | |
16 | #include <linux/proc_fs.h> | |
17 | #include <linux/types.h> | |
14cc3e2b | 18 | #include <linux/mutex.h> |
6f354b01 PB |
19 | |
20 | #include <asm/sn/addrs.h> | |
e55dea58 | 21 | #include <asm/sn/geo.h> |
6f354b01 PB |
22 | #include <asm/sn/l1.h> |
23 | #include <asm/sn/module.h> | |
24 | #include <asm/sn/pcibr_provider.h> | |
25 | #include <asm/sn/pcibus_provider_defs.h> | |
26 | #include <asm/sn/pcidev.h> | |
e55dea58 | 27 | #include <asm/sn/sn_feature_sets.h> |
6f354b01 PB |
28 | #include <asm/sn/sn_sal.h> |
29 | #include <asm/sn/types.h> | |
30 | ||
31 | #include "../pci.h" | |
32 | #include "pci_hotplug.h" | |
33 | ||
34 | MODULE_LICENSE("GPL"); | |
35 | MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)"); | |
36 | MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver"); | |
37 | ||
1d2450a4 PB |
38 | #define PCIIO_ASIC_TYPE_TIOCA 4 |
39 | #define PCI_SLOT_ALREADY_UP 2 /* slot already up */ | |
40 | #define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */ | |
41 | #define PCI_L1_ERR 7 /* L1 console command error */ | |
42 | #define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */ | |
43 | #define PCI_L1_QSIZE 128 /* our L1 message buffer size */ | |
44 | #define SN_MAX_HP_SLOTS 32 /* max hotplug slots */ | |
45 | #define SGI_HOTPLUG_PROM_REV 0x0430 /* Min. required PROM version */ | |
46 | #define SN_SLOT_NAME_SIZE 33 /* size of name string */ | |
6f354b01 PB |
47 | |
48 | /* internal list head */ | |
49 | static struct list_head sn_hp_list; | |
50 | ||
51 | /* hotplug_slot struct's private pointer */ | |
52 | struct slot { | |
53 | int device_num; | |
54 | struct pci_bus *pci_bus; | |
55 | /* this struct for glue internal only */ | |
56 | struct hotplug_slot *hotplug_slot; | |
57 | struct list_head hp_list; | |
1d2450a4 | 58 | char physical_path[SN_SLOT_NAME_SIZE]; |
6f354b01 PB |
59 | }; |
60 | ||
61 | struct pcibr_slot_enable_resp { | |
62 | int resp_sub_errno; | |
63 | char resp_l1_msg[PCI_L1_QSIZE + 1]; | |
64 | }; | |
65 | ||
66 | struct pcibr_slot_disable_resp { | |
67 | int resp_sub_errno; | |
68 | char resp_l1_msg[PCI_L1_QSIZE + 1]; | |
69 | }; | |
70 | ||
71 | enum sn_pci_req_e { | |
72 | PCI_REQ_SLOT_ELIGIBLE, | |
73 | PCI_REQ_SLOT_DISABLE | |
74 | }; | |
75 | ||
76 | static int enable_slot(struct hotplug_slot *slot); | |
77 | static int disable_slot(struct hotplug_slot *slot); | |
1d2450a4 | 78 | static inline int get_power_status(struct hotplug_slot *slot, u8 *value); |
6f354b01 PB |
79 | |
80 | static struct hotplug_slot_ops sn_hotplug_slot_ops = { | |
81 | .owner = THIS_MODULE, | |
82 | .enable_slot = enable_slot, | |
83 | .disable_slot = disable_slot, | |
84 | .get_power_status = get_power_status, | |
85 | }; | |
86 | ||
14cc3e2b | 87 | static DEFINE_MUTEX(sn_hotplug_mutex); |
6f354b01 | 88 | |
1d2450a4 PB |
89 | static ssize_t path_show (struct hotplug_slot *bss_hotplug_slot, |
90 | char *buf) | |
91 | { | |
92 | int retval = -ENOENT; | |
93 | struct slot *slot = bss_hotplug_slot->private; | |
94 | ||
95 | if (!slot) | |
96 | return retval; | |
97 | ||
98 | retval = sprintf (buf, "%s\n", slot->physical_path); | |
99 | return retval; | |
100 | } | |
101 | ||
102 | static struct hotplug_slot_attribute sn_slot_path_attr = __ATTR_RO(path); | |
103 | ||
6f354b01 PB |
104 | static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device) |
105 | { | |
106 | struct pcibus_info *pcibus_info; | |
e55dea58 | 107 | u16 busnum, segment, ioboard_type; |
6f354b01 PB |
108 | |
109 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); | |
110 | ||
111 | /* Check to see if this is a valid slot on 'pci_bus' */ | |
112 | if (!(pcibus_info->pbi_valid_devices & (1 << device))) | |
113 | return -EPERM; | |
114 | ||
e55dea58 PB |
115 | ioboard_type = sn_ioboard_to_pci_bus(pci_bus); |
116 | busnum = pcibus_info->pbi_buscommon.bs_persist_busnum; | |
117 | segment = pci_domain_nr(pci_bus) & 0xf; | |
6f354b01 PB |
118 | |
119 | /* Do not allow hotplug operations on base I/O cards */ | |
e55dea58 PB |
120 | if ((ioboard_type == L1_BRICKTYPE_IX || |
121 | ioboard_type == L1_BRICKTYPE_IA) && | |
122 | (segment == 1 && busnum == 0 && device != 1)) | |
6f354b01 PB |
123 | return -EPERM; |
124 | ||
125 | return 1; | |
126 | } | |
127 | ||
128 | static int sn_pci_bus_valid(struct pci_bus *pci_bus) | |
129 | { | |
130 | struct pcibus_info *pcibus_info; | |
e55dea58 PB |
131 | u32 asic_type; |
132 | u16 ioboard_type; | |
6f354b01 PB |
133 | |
134 | /* Don't register slots hanging off the TIOCA bus */ | |
e55dea58 | 135 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); |
6f354b01 PB |
136 | asic_type = pcibus_info->pbi_buscommon.bs_asic_type; |
137 | if (asic_type == PCIIO_ASIC_TYPE_TIOCA) | |
138 | return -EPERM; | |
139 | ||
140 | /* Only register slots in I/O Bricks that support hotplug */ | |
e55dea58 PB |
141 | ioboard_type = sn_ioboard_to_pci_bus(pci_bus); |
142 | switch (ioboard_type) { | |
1d2450a4 PB |
143 | case L1_BRICKTYPE_IX: |
144 | case L1_BRICKTYPE_PX: | |
145 | case L1_BRICKTYPE_IA: | |
146 | case L1_BRICKTYPE_PA: | |
e55dea58 | 147 | case L1_BOARDTYPE_PCIX3SLOT: |
1d2450a4 PB |
148 | return 1; |
149 | break; | |
150 | default: | |
151 | return -EPERM; | |
152 | break; | |
6f354b01 PB |
153 | } |
154 | ||
155 | return -EIO; | |
156 | } | |
157 | ||
158 | static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, | |
159 | struct pci_bus *pci_bus, int device) | |
160 | { | |
161 | struct pcibus_info *pcibus_info; | |
162 | struct slot *slot; | |
163 | ||
164 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); | |
165 | ||
656da9da | 166 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
1d2450a4 | 167 | if (!slot) |
6f354b01 | 168 | return -ENOMEM; |
1d2450a4 | 169 | bss_hotplug_slot->private = slot; |
6f354b01 | 170 | |
1d2450a4 | 171 | bss_hotplug_slot->name = kmalloc(SN_SLOT_NAME_SIZE, GFP_KERNEL); |
6f354b01 PB |
172 | if (!bss_hotplug_slot->name) { |
173 | kfree(bss_hotplug_slot->private); | |
174 | return -ENOMEM; | |
175 | } | |
176 | ||
177 | slot->device_num = device; | |
178 | slot->pci_bus = pci_bus; | |
1d2450a4 PB |
179 | sprintf(bss_hotplug_slot->name, "%04x:%02x:%02x", |
180 | pci_domain_nr(pci_bus), | |
e55dea58 | 181 | ((u16)pcibus_info->pbi_buscommon.bs_persist_busnum), |
1d2450a4 | 182 | device + 1); |
e55dea58 PB |
183 | |
184 | sn_generate_path(pci_bus, slot->physical_path); | |
185 | ||
6f354b01 PB |
186 | slot->hotplug_slot = bss_hotplug_slot; |
187 | list_add(&slot->hp_list, &sn_hp_list); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | static struct hotplug_slot * sn_hp_destroy(void) | |
193 | { | |
194 | struct slot *slot; | |
6f354b01 PB |
195 | struct hotplug_slot *bss_hotplug_slot = NULL; |
196 | ||
1d2450a4 | 197 | list_for_each_entry(slot, &sn_hp_list, hp_list) { |
6f354b01 PB |
198 | bss_hotplug_slot = slot->hotplug_slot; |
199 | list_del(&((struct slot *)bss_hotplug_slot->private)-> | |
200 | hp_list); | |
1d2450a4 PB |
201 | sysfs_remove_file(&bss_hotplug_slot->kobj, |
202 | &sn_slot_path_attr.attr); | |
6f354b01 PB |
203 | break; |
204 | } | |
205 | return bss_hotplug_slot; | |
206 | } | |
207 | ||
208 | static void sn_bus_alloc_data(struct pci_dev *dev) | |
209 | { | |
6f354b01 PB |
210 | struct pci_bus *subordinate_bus; |
211 | struct pci_dev *child; | |
212 | ||
213 | sn_pci_fixup_slot(dev); | |
214 | ||
215 | /* Recursively sets up the sn_irq_info structs */ | |
216 | if (dev->subordinate) { | |
217 | subordinate_bus = dev->subordinate; | |
1d2450a4 | 218 | list_for_each_entry(child, &subordinate_bus->devices, bus_list) |
6f354b01 | 219 | sn_bus_alloc_data(child); |
6f354b01 PB |
220 | } |
221 | } | |
222 | ||
223 | static void sn_bus_free_data(struct pci_dev *dev) | |
224 | { | |
6f354b01 PB |
225 | struct pci_bus *subordinate_bus; |
226 | struct pci_dev *child; | |
227 | ||
228 | /* Recursively clean up sn_irq_info structs */ | |
229 | if (dev->subordinate) { | |
230 | subordinate_bus = dev->subordinate; | |
1d2450a4 | 231 | list_for_each_entry(child, &subordinate_bus->devices, bus_list) |
6f354b01 | 232 | sn_bus_free_data(child); |
6f354b01 | 233 | } |
8e77af6a JK |
234 | /* |
235 | * Some drivers may use dma accesses during the | |
236 | * driver remove function. We release the sysdata | |
237 | * areas after the driver remove functions have | |
238 | * been called. | |
239 | */ | |
240 | sn_bus_store_sysdata(dev); | |
6f354b01 PB |
241 | sn_pci_unfixup_slot(dev); |
242 | } | |
243 | ||
6f354b01 PB |
244 | static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, |
245 | int device_num) | |
246 | { | |
1d2450a4 | 247 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
248 | struct pcibus_info *pcibus_info; |
249 | struct pcibr_slot_enable_resp resp; | |
250 | int rc; | |
251 | ||
252 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
253 | ||
254 | /* | |
255 | * Power-on and initialize the slot in the SN | |
256 | * PCI infrastructure. | |
257 | */ | |
258 | rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp); | |
259 | ||
260 | if (rc == PCI_SLOT_ALREADY_UP) { | |
261 | dev_dbg(slot->pci_bus->self, "is already active\n"); | |
1d2450a4 | 262 | return 1; /* return 1 to user */ |
6f354b01 PB |
263 | } |
264 | ||
265 | if (rc == PCI_L1_ERR) { | |
266 | dev_dbg(slot->pci_bus->self, | |
267 | "L1 failure %d with message: %s", | |
268 | resp.resp_sub_errno, resp.resp_l1_msg); | |
269 | return -EPERM; | |
270 | } | |
271 | ||
272 | if (rc) { | |
273 | dev_dbg(slot->pci_bus->self, | |
274 | "insert failed with error %d sub-error %d\n", | |
275 | rc, resp.resp_sub_errno); | |
276 | return -EIO; | |
277 | } | |
278 | ||
1d2450a4 PB |
279 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); |
280 | pcibus_info->pbi_enabled_devices |= (1 << device_num); | |
6f354b01 PB |
281 | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, | |
286 | int device_num, int action) | |
287 | { | |
1d2450a4 | 288 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
289 | struct pcibus_info *pcibus_info; |
290 | struct pcibr_slot_disable_resp resp; | |
291 | int rc; | |
292 | ||
293 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
294 | ||
295 | rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp); | |
296 | ||
1d2450a4 PB |
297 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && |
298 | (rc == PCI_SLOT_ALREADY_DOWN)) { | |
6f354b01 | 299 | dev_dbg(slot->pci_bus->self, "Slot %s already inactive\n"); |
1d2450a4 | 300 | return 1; /* return 1 to user */ |
6f354b01 PB |
301 | } |
302 | ||
1d2450a4 | 303 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) { |
6f354b01 PB |
304 | dev_dbg(slot->pci_bus->self, |
305 | "Cannot remove last 33MHz card\n"); | |
306 | return -EPERM; | |
307 | } | |
308 | ||
1d2450a4 | 309 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) { |
6f354b01 PB |
310 | dev_dbg(slot->pci_bus->self, |
311 | "L1 failure %d with message \n%s\n", | |
312 | resp.resp_sub_errno, resp.resp_l1_msg); | |
313 | return -EPERM; | |
314 | } | |
315 | ||
1d2450a4 | 316 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) { |
6f354b01 PB |
317 | dev_dbg(slot->pci_bus->self, |
318 | "remove failed with error %d sub-error %d\n", | |
319 | rc, resp.resp_sub_errno); | |
320 | return -EIO; | |
321 | } | |
322 | ||
1d2450a4 | 323 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc) |
6f354b01 PB |
324 | return 0; |
325 | ||
1d2450a4 PB |
326 | if ((action == PCI_REQ_SLOT_DISABLE) && !rc) { |
327 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
328 | pcibus_info->pbi_enabled_devices &= ~(1 << device_num); | |
6f354b01 PB |
329 | dev_dbg(slot->pci_bus->self, "remove successful\n"); |
330 | return 0; | |
331 | } | |
332 | ||
1d2450a4 | 333 | if ((action == PCI_REQ_SLOT_DISABLE) && rc) { |
6f354b01 | 334 | dev_dbg(slot->pci_bus->self,"remove failed rc = %d\n", rc); |
6f354b01 PB |
335 | } |
336 | ||
337 | return rc; | |
338 | } | |
339 | ||
340 | static int enable_slot(struct hotplug_slot *bss_hotplug_slot) | |
341 | { | |
1d2450a4 | 342 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
343 | struct pci_bus *new_bus = NULL; |
344 | struct pci_dev *dev; | |
345 | int func, num_funcs; | |
346 | int new_ppb = 0; | |
347 | int rc; | |
348 | ||
349 | /* Serialize the Linux PCI infrastructure */ | |
14cc3e2b | 350 | mutex_lock(&sn_hotplug_mutex); |
6f354b01 PB |
351 | |
352 | /* | |
353 | * Power-on and initialize the slot in the SN | |
354 | * PCI infrastructure. | |
355 | */ | |
356 | rc = sn_slot_enable(bss_hotplug_slot, slot->device_num); | |
357 | if (rc) { | |
14cc3e2b | 358 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
359 | return rc; |
360 | } | |
361 | ||
1d2450a4 PB |
362 | num_funcs = pci_scan_slot(slot->pci_bus, |
363 | PCI_DEVFN(slot->device_num + 1, 0)); | |
6f354b01 PB |
364 | if (!num_funcs) { |
365 | dev_dbg(slot->pci_bus->self, "no device in slot\n"); | |
14cc3e2b | 366 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
367 | return -ENODEV; |
368 | } | |
369 | ||
370 | sn_pci_controller_fixup(pci_domain_nr(slot->pci_bus), | |
371 | slot->pci_bus->number, | |
372 | slot->pci_bus); | |
373 | /* | |
374 | * Map SN resources for all functions on the card | |
375 | * to the Linux PCI interface and tell the drivers | |
376 | * about them. | |
377 | */ | |
378 | for (func = 0; func < num_funcs; func++) { | |
379 | dev = pci_get_slot(slot->pci_bus, | |
380 | PCI_DEVFN(slot->device_num + 1, | |
381 | PCI_FUNC(func))); | |
6f354b01 PB |
382 | if (dev) { |
383 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { | |
384 | unsigned char sec_bus; | |
385 | pci_read_config_byte(dev, PCI_SECONDARY_BUS, | |
386 | &sec_bus); | |
387 | new_bus = pci_add_new_bus(dev->bus, dev, | |
388 | sec_bus); | |
389 | pci_scan_child_bus(new_bus); | |
390 | sn_pci_controller_fixup(pci_domain_nr(new_bus), | |
391 | new_bus->number, | |
392 | new_bus); | |
393 | new_ppb = 1; | |
394 | } | |
395 | sn_bus_alloc_data(dev); | |
396 | pci_dev_put(dev); | |
397 | } | |
398 | } | |
399 | ||
400 | /* Call the driver for the new device */ | |
401 | pci_bus_add_devices(slot->pci_bus); | |
402 | /* Call the drivers for the new devices subordinate to PPB */ | |
403 | if (new_ppb) | |
404 | pci_bus_add_devices(new_bus); | |
405 | ||
14cc3e2b | 406 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
407 | |
408 | if (rc == 0) | |
409 | dev_dbg(slot->pci_bus->self, | |
410 | "insert operation successful\n"); | |
411 | else | |
412 | dev_dbg(slot->pci_bus->self, | |
413 | "insert operation failed rc = %d\n", rc); | |
414 | ||
415 | return rc; | |
416 | } | |
417 | ||
418 | static int disable_slot(struct hotplug_slot *bss_hotplug_slot) | |
419 | { | |
1d2450a4 | 420 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
421 | struct pci_dev *dev; |
422 | int func; | |
423 | int rc; | |
424 | ||
425 | /* Acquire update access to the bus */ | |
14cc3e2b | 426 | mutex_lock(&sn_hotplug_mutex); |
6f354b01 PB |
427 | |
428 | /* is it okay to bring this slot down? */ | |
429 | rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, | |
430 | PCI_REQ_SLOT_ELIGIBLE); | |
431 | if (rc) | |
432 | goto leaving; | |
433 | ||
434 | /* Free the SN resources assigned to the Linux device.*/ | |
435 | for (func = 0; func < 8; func++) { | |
436 | dev = pci_get_slot(slot->pci_bus, | |
1d2450a4 | 437 | PCI_DEVFN(slot->device_num + 1, |
6f354b01 PB |
438 | PCI_FUNC(func))); |
439 | if (dev) { | |
6f354b01 PB |
440 | sn_bus_free_data(dev); |
441 | pci_remove_bus_device(dev); | |
442 | pci_dev_put(dev); | |
443 | } | |
444 | } | |
445 | ||
446 | /* free the collected sysdata pointers */ | |
447 | sn_bus_free_sysdata(); | |
448 | ||
449 | /* Deactivate slot */ | |
450 | rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, | |
451 | PCI_REQ_SLOT_DISABLE); | |
452 | leaving: | |
453 | /* Release the bus lock */ | |
14cc3e2b | 454 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
455 | |
456 | return rc; | |
457 | } | |
458 | ||
1d2450a4 PB |
459 | static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot, |
460 | u8 *value) | |
6f354b01 | 461 | { |
1d2450a4 PB |
462 | struct slot *slot = bss_hotplug_slot->private; |
463 | struct pcibus_info *pcibus_info; | |
464 | ||
465 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
14cc3e2b | 466 | mutex_lock(&sn_hotplug_mutex); |
1d2450a4 | 467 | *value = pcibus_info->pbi_enabled_devices & (1 << slot->device_num); |
14cc3e2b | 468 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
469 | return 0; |
470 | } | |
471 | ||
472 | static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot) | |
473 | { | |
474 | kfree(bss_hotplug_slot->info); | |
475 | kfree(bss_hotplug_slot->name); | |
476 | kfree(bss_hotplug_slot->private); | |
477 | kfree(bss_hotplug_slot); | |
478 | } | |
479 | ||
480 | static int sn_hotplug_slot_register(struct pci_bus *pci_bus) | |
481 | { | |
482 | int device; | |
483 | struct hotplug_slot *bss_hotplug_slot; | |
484 | int rc = 0; | |
485 | ||
486 | /* | |
487 | * Currently only four devices are supported, | |
488 | * in the future there maybe more -- up to 32. | |
489 | */ | |
490 | ||
491 | for (device = 0; device < SN_MAX_HP_SLOTS ; device++) { | |
492 | if (sn_pci_slot_valid(pci_bus, device) != 1) | |
493 | continue; | |
494 | ||
656da9da | 495 | bss_hotplug_slot = kzalloc(sizeof(*bss_hotplug_slot), |
6f354b01 PB |
496 | GFP_KERNEL); |
497 | if (!bss_hotplug_slot) { | |
498 | rc = -ENOMEM; | |
499 | goto alloc_err; | |
500 | } | |
501 | ||
502 | bss_hotplug_slot->info = | |
656da9da | 503 | kzalloc(sizeof(struct hotplug_slot_info), |
6f354b01 PB |
504 | GFP_KERNEL); |
505 | if (!bss_hotplug_slot->info) { | |
506 | rc = -ENOMEM; | |
507 | goto alloc_err; | |
508 | } | |
509 | ||
510 | if (sn_hp_slot_private_alloc(bss_hotplug_slot, | |
511 | pci_bus, device)) { | |
512 | rc = -ENOMEM; | |
513 | goto alloc_err; | |
514 | } | |
515 | ||
516 | bss_hotplug_slot->ops = &sn_hotplug_slot_ops; | |
517 | bss_hotplug_slot->release = &sn_release_slot; | |
518 | ||
519 | rc = pci_hp_register(bss_hotplug_slot); | |
520 | if (rc) | |
521 | goto register_err; | |
1d2450a4 PB |
522 | |
523 | rc = sysfs_create_file(&bss_hotplug_slot->kobj, | |
524 | &sn_slot_path_attr.attr); | |
525 | if (rc) | |
526 | goto register_err; | |
6f354b01 PB |
527 | } |
528 | dev_dbg(pci_bus->self, "Registered bus with hotplug\n"); | |
529 | return rc; | |
530 | ||
531 | register_err: | |
532 | dev_dbg(pci_bus->self, "bus failed to register with err = %d\n", | |
533 | rc); | |
534 | ||
535 | alloc_err: | |
536 | if (rc == -ENOMEM) | |
537 | dev_dbg(pci_bus->self, "Memory allocation error\n"); | |
538 | ||
539 | /* destroy THIS element */ | |
540 | if (bss_hotplug_slot) | |
541 | sn_release_slot(bss_hotplug_slot); | |
542 | ||
543 | /* destroy anything else on the list */ | |
544 | while ((bss_hotplug_slot = sn_hp_destroy())) | |
545 | pci_hp_deregister(bss_hotplug_slot); | |
546 | ||
547 | return rc; | |
548 | } | |
549 | ||
550 | static int sn_pci_hotplug_init(void) | |
551 | { | |
552 | struct pci_bus *pci_bus = NULL; | |
553 | int rc; | |
554 | int registered = 0; | |
555 | ||
e55dea58 PB |
556 | if (!sn_prom_feature_available(PRF_HOTPLUG_SUPPORT)) { |
557 | printk(KERN_ERR "%s: PROM version does not support hotplug.\n", | |
6f354b01 PB |
558 | __FUNCTION__); |
559 | return -EPERM; | |
560 | } | |
561 | ||
1d2450a4 PB |
562 | INIT_LIST_HEAD(&sn_hp_list); |
563 | ||
6f354b01 PB |
564 | while ((pci_bus = pci_find_next_bus(pci_bus))) { |
565 | if (!pci_bus->sysdata) | |
566 | continue; | |
567 | ||
568 | rc = sn_pci_bus_valid(pci_bus); | |
569 | if (rc != 1) { | |
570 | dev_dbg(pci_bus->self, "not a valid hotplug bus\n"); | |
571 | continue; | |
572 | } | |
573 | dev_dbg(pci_bus->self, "valid hotplug bus\n"); | |
574 | ||
575 | rc = sn_hotplug_slot_register(pci_bus); | |
1d2450a4 | 576 | if (!rc) { |
6f354b01 | 577 | registered = 1; |
1d2450a4 | 578 | } else { |
6f354b01 PB |
579 | registered = 0; |
580 | break; | |
581 | } | |
582 | } | |
583 | ||
584 | return registered == 1 ? 0 : -ENODEV; | |
585 | } | |
586 | ||
587 | static void sn_pci_hotplug_exit(void) | |
588 | { | |
589 | struct hotplug_slot *bss_hotplug_slot; | |
590 | ||
1d2450a4 | 591 | while ((bss_hotplug_slot = sn_hp_destroy())) |
6f354b01 | 592 | pci_hp_deregister(bss_hotplug_slot); |
6f354b01 PB |
593 | |
594 | if (!list_empty(&sn_hp_list)) | |
595 | printk(KERN_ERR "%s: internal list is not empty\n", __FILE__); | |
596 | } | |
597 | ||
598 | module_init(sn_pci_hotplug_init); | |
599 | module_exit(sn_pci_hotplug_exit); |