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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> | |
7a54f25c | 16 | #include <linux/pci_hotplug.h> |
6f354b01 PB |
17 | #include <linux/proc_fs.h> |
18 | #include <linux/types.h> | |
14cc3e2b | 19 | #include <linux/mutex.h> |
6f354b01 PB |
20 | |
21 | #include <asm/sn/addrs.h> | |
e55dea58 | 22 | #include <asm/sn/geo.h> |
6f354b01 PB |
23 | #include <asm/sn/l1.h> |
24 | #include <asm/sn/module.h> | |
25 | #include <asm/sn/pcibr_provider.h> | |
26 | #include <asm/sn/pcibus_provider_defs.h> | |
27 | #include <asm/sn/pcidev.h> | |
e55dea58 | 28 | #include <asm/sn/sn_feature_sets.h> |
6f354b01 PB |
29 | #include <asm/sn/sn_sal.h> |
30 | #include <asm/sn/types.h> | |
3e643e77 JK |
31 | #include <linux/acpi.h> |
32 | #include <asm/sn/acpi.h> | |
6f354b01 PB |
33 | |
34 | #include "../pci.h" | |
6f354b01 PB |
35 | |
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)"); | |
38 | MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver"); | |
39 | ||
3e643e77 JK |
40 | |
41 | /* SAL call error codes. Keep in sync with prom header io/include/pcibr.h */ | |
1d2450a4 PB |
42 | #define PCI_SLOT_ALREADY_UP 2 /* slot already up */ |
43 | #define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */ | |
44 | #define PCI_L1_ERR 7 /* L1 console command error */ | |
45 | #define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */ | |
3e643e77 JK |
46 | |
47 | ||
48 | #define PCIIO_ASIC_TYPE_TIOCA 4 | |
1d2450a4 PB |
49 | #define PCI_L1_QSIZE 128 /* our L1 message buffer size */ |
50 | #define SN_MAX_HP_SLOTS 32 /* max hotplug slots */ | |
1d2450a4 | 51 | #define SN_SLOT_NAME_SIZE 33 /* size of name string */ |
6f354b01 PB |
52 | |
53 | /* internal list head */ | |
54 | static struct list_head sn_hp_list; | |
55 | ||
56 | /* hotplug_slot struct's private pointer */ | |
57 | struct slot { | |
58 | int device_num; | |
59 | struct pci_bus *pci_bus; | |
60 | /* this struct for glue internal only */ | |
61 | struct hotplug_slot *hotplug_slot; | |
62 | struct list_head hp_list; | |
1d2450a4 | 63 | char physical_path[SN_SLOT_NAME_SIZE]; |
6f354b01 PB |
64 | }; |
65 | ||
66 | struct pcibr_slot_enable_resp { | |
67 | int resp_sub_errno; | |
68 | char resp_l1_msg[PCI_L1_QSIZE + 1]; | |
69 | }; | |
70 | ||
71 | struct pcibr_slot_disable_resp { | |
72 | int resp_sub_errno; | |
73 | char resp_l1_msg[PCI_L1_QSIZE + 1]; | |
74 | }; | |
75 | ||
76 | enum sn_pci_req_e { | |
77 | PCI_REQ_SLOT_ELIGIBLE, | |
78 | PCI_REQ_SLOT_DISABLE | |
79 | }; | |
80 | ||
81 | static int enable_slot(struct hotplug_slot *slot); | |
82 | static int disable_slot(struct hotplug_slot *slot); | |
1d2450a4 | 83 | static inline int get_power_status(struct hotplug_slot *slot, u8 *value); |
6f354b01 PB |
84 | |
85 | static struct hotplug_slot_ops sn_hotplug_slot_ops = { | |
6f354b01 PB |
86 | .enable_slot = enable_slot, |
87 | .disable_slot = disable_slot, | |
88 | .get_power_status = get_power_status, | |
89 | }; | |
90 | ||
14cc3e2b | 91 | static DEFINE_MUTEX(sn_hotplug_mutex); |
6f354b01 | 92 | |
94f81a47 | 93 | static ssize_t path_show(struct pci_slot *pci_slot, char *buf) |
1d2450a4 PB |
94 | { |
95 | int retval = -ENOENT; | |
94f81a47 | 96 | struct slot *slot = pci_slot->hotplug->private; |
1d2450a4 PB |
97 | |
98 | if (!slot) | |
99 | return retval; | |
100 | ||
101 | retval = sprintf (buf, "%s\n", slot->physical_path); | |
102 | return retval; | |
103 | } | |
104 | ||
94f81a47 | 105 | static struct pci_slot_attribute sn_slot_path_attr = __ATTR_RO(path); |
1d2450a4 | 106 | |
6f354b01 PB |
107 | static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device) |
108 | { | |
109 | struct pcibus_info *pcibus_info; | |
e55dea58 | 110 | u16 busnum, segment, ioboard_type; |
6f354b01 PB |
111 | |
112 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); | |
113 | ||
114 | /* Check to see if this is a valid slot on 'pci_bus' */ | |
115 | if (!(pcibus_info->pbi_valid_devices & (1 << device))) | |
116 | return -EPERM; | |
117 | ||
e55dea58 PB |
118 | ioboard_type = sn_ioboard_to_pci_bus(pci_bus); |
119 | busnum = pcibus_info->pbi_buscommon.bs_persist_busnum; | |
120 | segment = pci_domain_nr(pci_bus) & 0xf; | |
6f354b01 PB |
121 | |
122 | /* Do not allow hotplug operations on base I/O cards */ | |
e55dea58 PB |
123 | if ((ioboard_type == L1_BRICKTYPE_IX || |
124 | ioboard_type == L1_BRICKTYPE_IA) && | |
125 | (segment == 1 && busnum == 0 && device != 1)) | |
6f354b01 PB |
126 | return -EPERM; |
127 | ||
128 | return 1; | |
129 | } | |
130 | ||
131 | static int sn_pci_bus_valid(struct pci_bus *pci_bus) | |
132 | { | |
133 | struct pcibus_info *pcibus_info; | |
e55dea58 PB |
134 | u32 asic_type; |
135 | u16 ioboard_type; | |
6f354b01 PB |
136 | |
137 | /* Don't register slots hanging off the TIOCA bus */ | |
e55dea58 | 138 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); |
6f354b01 PB |
139 | asic_type = pcibus_info->pbi_buscommon.bs_asic_type; |
140 | if (asic_type == PCIIO_ASIC_TYPE_TIOCA) | |
141 | return -EPERM; | |
142 | ||
143 | /* Only register slots in I/O Bricks that support hotplug */ | |
e55dea58 PB |
144 | ioboard_type = sn_ioboard_to_pci_bus(pci_bus); |
145 | switch (ioboard_type) { | |
1d2450a4 PB |
146 | case L1_BRICKTYPE_IX: |
147 | case L1_BRICKTYPE_PX: | |
148 | case L1_BRICKTYPE_IA: | |
149 | case L1_BRICKTYPE_PA: | |
e55dea58 | 150 | case L1_BOARDTYPE_PCIX3SLOT: |
1d2450a4 PB |
151 | return 1; |
152 | break; | |
153 | default: | |
154 | return -EPERM; | |
155 | break; | |
6f354b01 PB |
156 | } |
157 | ||
158 | return -EIO; | |
159 | } | |
160 | ||
161 | static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, | |
85234ce8 AC |
162 | struct pci_bus *pci_bus, int device, |
163 | char *name) | |
6f354b01 PB |
164 | { |
165 | struct pcibus_info *pcibus_info; | |
166 | struct slot *slot; | |
167 | ||
168 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); | |
169 | ||
656da9da | 170 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
1d2450a4 | 171 | if (!slot) |
6f354b01 | 172 | return -ENOMEM; |
1d2450a4 | 173 | bss_hotplug_slot->private = slot; |
6f354b01 | 174 | |
6f354b01 PB |
175 | slot->device_num = device; |
176 | slot->pci_bus = pci_bus; | |
85234ce8 | 177 | sprintf(name, "%04x:%02x:%02x", |
1d2450a4 | 178 | pci_domain_nr(pci_bus), |
e55dea58 | 179 | ((u16)pcibus_info->pbi_buscommon.bs_persist_busnum), |
1d2450a4 | 180 | device + 1); |
e55dea58 PB |
181 | |
182 | sn_generate_path(pci_bus, slot->physical_path); | |
183 | ||
6f354b01 PB |
184 | slot->hotplug_slot = bss_hotplug_slot; |
185 | list_add(&slot->hp_list, &sn_hp_list); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static struct hotplug_slot * sn_hp_destroy(void) | |
191 | { | |
192 | struct slot *slot; | |
f46753c5 | 193 | struct pci_slot *pci_slot; |
6f354b01 PB |
194 | struct hotplug_slot *bss_hotplug_slot = NULL; |
195 | ||
1d2450a4 | 196 | list_for_each_entry(slot, &sn_hp_list, hp_list) { |
6f354b01 | 197 | bss_hotplug_slot = slot->hotplug_slot; |
f46753c5 | 198 | pci_slot = bss_hotplug_slot->pci_slot; |
6f354b01 PB |
199 | list_del(&((struct slot *)bss_hotplug_slot->private)-> |
200 | hp_list); | |
f46753c5 | 201 | sysfs_remove_file(&pci_slot->kobj, |
1d2450a4 | 202 | &sn_slot_path_attr.attr); |
6f354b01 PB |
203 | break; |
204 | } | |
205 | return bss_hotplug_slot; | |
206 | } | |
207 | ||
6f354b01 PB |
208 | static void sn_bus_free_data(struct pci_dev *dev) |
209 | { | |
6f354b01 PB |
210 | struct pci_bus *subordinate_bus; |
211 | struct pci_dev *child; | |
212 | ||
213 | /* Recursively clean up sn_irq_info structs */ | |
214 | if (dev->subordinate) { | |
215 | subordinate_bus = dev->subordinate; | |
1d2450a4 | 216 | list_for_each_entry(child, &subordinate_bus->devices, bus_list) |
6f354b01 | 217 | sn_bus_free_data(child); |
6f354b01 | 218 | } |
8e77af6a JK |
219 | /* |
220 | * Some drivers may use dma accesses during the | |
221 | * driver remove function. We release the sysdata | |
222 | * areas after the driver remove functions have | |
223 | * been called. | |
224 | */ | |
225 | sn_bus_store_sysdata(dev); | |
6f354b01 PB |
226 | sn_pci_unfixup_slot(dev); |
227 | } | |
228 | ||
6f354b01 | 229 | static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, |
3e643e77 | 230 | int device_num, char **ssdt) |
6f354b01 | 231 | { |
1d2450a4 | 232 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
233 | struct pcibus_info *pcibus_info; |
234 | struct pcibr_slot_enable_resp resp; | |
235 | int rc; | |
236 | ||
237 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
238 | ||
239 | /* | |
240 | * Power-on and initialize the slot in the SN | |
241 | * PCI infrastructure. | |
242 | */ | |
3e643e77 JK |
243 | rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp, ssdt); |
244 | ||
6f354b01 PB |
245 | |
246 | if (rc == PCI_SLOT_ALREADY_UP) { | |
34ef30ca | 247 | dev_dbg(&slot->pci_bus->self->dev, "is already active\n"); |
1d2450a4 | 248 | return 1; /* return 1 to user */ |
6f354b01 PB |
249 | } |
250 | ||
251 | if (rc == PCI_L1_ERR) { | |
34ef30ca | 252 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
253 | "L1 failure %d with message: %s", |
254 | resp.resp_sub_errno, resp.resp_l1_msg); | |
255 | return -EPERM; | |
256 | } | |
257 | ||
258 | if (rc) { | |
34ef30ca | 259 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
260 | "insert failed with error %d sub-error %d\n", |
261 | rc, resp.resp_sub_errno); | |
262 | return -EIO; | |
263 | } | |
264 | ||
1d2450a4 PB |
265 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); |
266 | pcibus_info->pbi_enabled_devices |= (1 << device_num); | |
6f354b01 PB |
267 | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, | |
272 | int device_num, int action) | |
273 | { | |
1d2450a4 | 274 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
275 | struct pcibus_info *pcibus_info; |
276 | struct pcibr_slot_disable_resp resp; | |
277 | int rc; | |
278 | ||
279 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
280 | ||
281 | rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp); | |
282 | ||
1d2450a4 PB |
283 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && |
284 | (rc == PCI_SLOT_ALREADY_DOWN)) { | |
34ef30ca | 285 | dev_dbg(&slot->pci_bus->self->dev, "Slot %s already inactive\n", slot->physical_path); |
1d2450a4 | 286 | return 1; /* return 1 to user */ |
6f354b01 PB |
287 | } |
288 | ||
1d2450a4 | 289 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) { |
34ef30ca | 290 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
291 | "Cannot remove last 33MHz card\n"); |
292 | return -EPERM; | |
293 | } | |
294 | ||
1d2450a4 | 295 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) { |
34ef30ca | 296 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
297 | "L1 failure %d with message \n%s\n", |
298 | resp.resp_sub_errno, resp.resp_l1_msg); | |
299 | return -EPERM; | |
300 | } | |
301 | ||
1d2450a4 | 302 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) { |
34ef30ca | 303 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
304 | "remove failed with error %d sub-error %d\n", |
305 | rc, resp.resp_sub_errno); | |
306 | return -EIO; | |
307 | } | |
308 | ||
1d2450a4 | 309 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc) |
6f354b01 PB |
310 | return 0; |
311 | ||
1d2450a4 PB |
312 | if ((action == PCI_REQ_SLOT_DISABLE) && !rc) { |
313 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
314 | pcibus_info->pbi_enabled_devices &= ~(1 << device_num); | |
34ef30ca | 315 | dev_dbg(&slot->pci_bus->self->dev, "remove successful\n"); |
6f354b01 PB |
316 | return 0; |
317 | } | |
318 | ||
1d2450a4 | 319 | if ((action == PCI_REQ_SLOT_DISABLE) && rc) { |
34ef30ca | 320 | dev_dbg(&slot->pci_bus->self->dev,"remove failed rc = %d\n", rc); |
6f354b01 PB |
321 | } |
322 | ||
323 | return rc; | |
324 | } | |
325 | ||
9f581f16 JK |
326 | /* |
327 | * Power up and configure the slot via a SAL call to PROM. | |
328 | * Scan slot (and any children), do any platform specific fixup, | |
329 | * and find device driver. | |
330 | */ | |
6f354b01 PB |
331 | static int enable_slot(struct hotplug_slot *bss_hotplug_slot) |
332 | { | |
1d2450a4 | 333 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
334 | struct pci_bus *new_bus = NULL; |
335 | struct pci_dev *dev; | |
336 | int func, num_funcs; | |
337 | int new_ppb = 0; | |
338 | int rc; | |
3e643e77 | 339 | char *ssdt = NULL; |
9f581f16 | 340 | void pcibios_fixup_device_resources(struct pci_dev *); |
6f354b01 PB |
341 | |
342 | /* Serialize the Linux PCI infrastructure */ | |
14cc3e2b | 343 | mutex_lock(&sn_hotplug_mutex); |
6f354b01 PB |
344 | |
345 | /* | |
346 | * Power-on and initialize the slot in the SN | |
3e643e77 JK |
347 | * PCI infrastructure. Also, retrieve the ACPI SSDT |
348 | * table for the slot (if ACPI capable PROM). | |
6f354b01 | 349 | */ |
3e643e77 | 350 | rc = sn_slot_enable(bss_hotplug_slot, slot->device_num, &ssdt); |
6f354b01 | 351 | if (rc) { |
14cc3e2b | 352 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
353 | return rc; |
354 | } | |
355 | ||
3e643e77 JK |
356 | if (ssdt) |
357 | ssdt = __va(ssdt); | |
358 | /* Add the new SSDT for the slot to the ACPI namespace */ | |
359 | if (SN_ACPI_BASE_SUPPORT() && ssdt) { | |
360 | acpi_status ret; | |
361 | ||
362 | ret = acpi_load_table((struct acpi_table_header *)ssdt); | |
363 | if (ACPI_FAILURE(ret)) { | |
364 | printk(KERN_ERR "%s: acpi_load_table failed (0x%x)\n", | |
66bef8c0 | 365 | __func__, ret); |
3e643e77 JK |
366 | /* try to continue on */ |
367 | } | |
368 | } | |
369 | ||
1d2450a4 PB |
370 | num_funcs = pci_scan_slot(slot->pci_bus, |
371 | PCI_DEVFN(slot->device_num + 1, 0)); | |
6f354b01 | 372 | if (!num_funcs) { |
34ef30ca | 373 | dev_dbg(&slot->pci_bus->self->dev, "no device in slot\n"); |
14cc3e2b | 374 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
375 | return -ENODEV; |
376 | } | |
377 | ||
6f354b01 PB |
378 | /* |
379 | * Map SN resources for all functions on the card | |
380 | * to the Linux PCI interface and tell the drivers | |
381 | * about them. | |
382 | */ | |
383 | for (func = 0; func < num_funcs; func++) { | |
384 | dev = pci_get_slot(slot->pci_bus, | |
385 | PCI_DEVFN(slot->device_num + 1, | |
386 | PCI_FUNC(func))); | |
6f354b01 | 387 | if (dev) { |
9f581f16 JK |
388 | /* Need to do slot fixup on PPB before fixup of children |
389 | * (PPB's pcidev_info needs to be in pcidev_info list | |
390 | * before child's SN_PCIDEV_INFO() call to setup | |
391 | * pdi_host_pcidev_info). | |
392 | */ | |
393 | pcibios_fixup_device_resources(dev); | |
3e643e77 JK |
394 | if (SN_ACPI_BASE_SUPPORT()) |
395 | sn_acpi_slot_fixup(dev); | |
396 | else | |
397 | sn_io_slot_fixup(dev); | |
6f354b01 PB |
398 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { |
399 | unsigned char sec_bus; | |
400 | pci_read_config_byte(dev, PCI_SECONDARY_BUS, | |
401 | &sec_bus); | |
402 | new_bus = pci_add_new_bus(dev->bus, dev, | |
403 | sec_bus); | |
404 | pci_scan_child_bus(new_bus); | |
6f354b01 PB |
405 | new_ppb = 1; |
406 | } | |
6f354b01 PB |
407 | pci_dev_put(dev); |
408 | } | |
409 | } | |
410 | ||
3e643e77 JK |
411 | /* |
412 | * Add the slot's devices to the ACPI infrastructure */ | |
413 | if (SN_ACPI_BASE_SUPPORT() && ssdt) { | |
27663c58 | 414 | unsigned long long adr; |
3e643e77 JK |
415 | struct acpi_device *pdevice; |
416 | struct acpi_device *device; | |
417 | acpi_handle phandle; | |
418 | acpi_handle chandle = NULL; | |
419 | acpi_handle rethandle; | |
420 | acpi_status ret; | |
421 | ||
422 | phandle = PCI_CONTROLLER(slot->pci_bus)->acpi_handle; | |
423 | ||
424 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
34ef30ca | 425 | dev_dbg(&slot->pci_bus->self->dev, |
3e643e77 JK |
426 | "no parent device, assuming NULL\n"); |
427 | pdevice = NULL; | |
428 | } | |
429 | ||
430 | /* | |
431 | * Walk the rootbus node's immediate children looking for | |
432 | * the slot's device node(s). There can be more than | |
433 | * one for multifunction devices. | |
434 | */ | |
435 | for (;;) { | |
436 | rethandle = NULL; | |
437 | ret = acpi_get_next_object(ACPI_TYPE_DEVICE, | |
438 | phandle, chandle, | |
439 | &rethandle); | |
440 | ||
441 | if (ret == AE_NOT_FOUND || rethandle == NULL) | |
442 | break; | |
443 | ||
444 | chandle = rethandle; | |
445 | ||
446 | ret = acpi_evaluate_integer(chandle, METHOD_NAME__ADR, | |
447 | NULL, &adr); | |
448 | ||
449 | if (ACPI_SUCCESS(ret) && | |
450 | (adr>>16) == (slot->device_num + 1)) { | |
451 | ||
452 | ret = acpi_bus_add(&device, pdevice, chandle, | |
453 | ACPI_BUS_TYPE_DEVICE); | |
454 | if (ACPI_FAILURE(ret)) { | |
455 | printk(KERN_ERR "%s: acpi_bus_add " | |
456 | "failed (0x%x) for slot %d " | |
66bef8c0 | 457 | "func %d\n", __func__, |
3e643e77 JK |
458 | ret, (int)(adr>>16), |
459 | (int)(adr&0xffff)); | |
460 | /* try to continue on */ | |
461 | } else { | |
462 | acpi_bus_start(device); | |
463 | } | |
464 | } | |
465 | } | |
466 | } | |
467 | ||
6f354b01 PB |
468 | /* Call the driver for the new device */ |
469 | pci_bus_add_devices(slot->pci_bus); | |
470 | /* Call the drivers for the new devices subordinate to PPB */ | |
471 | if (new_ppb) | |
472 | pci_bus_add_devices(new_bus); | |
473 | ||
14cc3e2b | 474 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
475 | |
476 | if (rc == 0) | |
34ef30ca | 477 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
478 | "insert operation successful\n"); |
479 | else | |
34ef30ca | 480 | dev_dbg(&slot->pci_bus->self->dev, |
6f354b01 PB |
481 | "insert operation failed rc = %d\n", rc); |
482 | ||
483 | return rc; | |
484 | } | |
485 | ||
486 | static int disable_slot(struct hotplug_slot *bss_hotplug_slot) | |
487 | { | |
1d2450a4 | 488 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
489 | struct pci_dev *dev; |
490 | int func; | |
491 | int rc; | |
3e643e77 | 492 | acpi_owner_id ssdt_id = 0; |
6f354b01 PB |
493 | |
494 | /* Acquire update access to the bus */ | |
14cc3e2b | 495 | mutex_lock(&sn_hotplug_mutex); |
6f354b01 PB |
496 | |
497 | /* is it okay to bring this slot down? */ | |
498 | rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, | |
499 | PCI_REQ_SLOT_ELIGIBLE); | |
500 | if (rc) | |
501 | goto leaving; | |
502 | ||
3e643e77 JK |
503 | /* free the ACPI resources for the slot */ |
504 | if (SN_ACPI_BASE_SUPPORT() && | |
505 | PCI_CONTROLLER(slot->pci_bus)->acpi_handle) { | |
27663c58 | 506 | unsigned long long adr; |
3e643e77 JK |
507 | struct acpi_device *device; |
508 | acpi_handle phandle; | |
509 | acpi_handle chandle = NULL; | |
510 | acpi_handle rethandle; | |
511 | acpi_status ret; | |
512 | ||
513 | /* Get the rootbus node pointer */ | |
514 | phandle = PCI_CONTROLLER(slot->pci_bus)->acpi_handle; | |
515 | ||
516 | /* | |
517 | * Walk the rootbus node's immediate children looking for | |
518 | * the slot's device node(s). There can be more than | |
519 | * one for multifunction devices. | |
520 | */ | |
521 | for (;;) { | |
522 | rethandle = NULL; | |
523 | ret = acpi_get_next_object(ACPI_TYPE_DEVICE, | |
524 | phandle, chandle, | |
525 | &rethandle); | |
526 | ||
527 | if (ret == AE_NOT_FOUND || rethandle == NULL) | |
528 | break; | |
529 | ||
530 | chandle = rethandle; | |
531 | ||
532 | ret = acpi_evaluate_integer(chandle, | |
533 | METHOD_NAME__ADR, | |
534 | NULL, &adr); | |
535 | if (ACPI_SUCCESS(ret) && | |
536 | (adr>>16) == (slot->device_num + 1)) { | |
537 | /* retain the owner id */ | |
538 | acpi_get_id(chandle, &ssdt_id); | |
539 | ||
540 | ret = acpi_bus_get_device(chandle, | |
541 | &device); | |
542 | if (ACPI_SUCCESS(ret)) | |
543 | acpi_bus_trim(device, 1); | |
544 | } | |
545 | } | |
546 | ||
547 | } | |
548 | ||
6f354b01 PB |
549 | /* Free the SN resources assigned to the Linux device.*/ |
550 | for (func = 0; func < 8; func++) { | |
551 | dev = pci_get_slot(slot->pci_bus, | |
1d2450a4 | 552 | PCI_DEVFN(slot->device_num + 1, |
6f354b01 PB |
553 | PCI_FUNC(func))); |
554 | if (dev) { | |
6f354b01 PB |
555 | sn_bus_free_data(dev); |
556 | pci_remove_bus_device(dev); | |
557 | pci_dev_put(dev); | |
558 | } | |
559 | } | |
560 | ||
3e643e77 JK |
561 | /* Remove the SSDT for the slot from the ACPI namespace */ |
562 | if (SN_ACPI_BASE_SUPPORT() && ssdt_id) { | |
563 | acpi_status ret; | |
564 | ret = acpi_unload_table_id(ssdt_id); | |
565 | if (ACPI_FAILURE(ret)) { | |
566 | printk(KERN_ERR "%s: acpi_unload_table_id " | |
567 | "failed (0x%x) for id %d\n", | |
66bef8c0 | 568 | __func__, ret, ssdt_id); |
3e643e77 JK |
569 | /* try to continue on */ |
570 | } | |
571 | } | |
572 | ||
6f354b01 PB |
573 | /* free the collected sysdata pointers */ |
574 | sn_bus_free_sysdata(); | |
575 | ||
576 | /* Deactivate slot */ | |
577 | rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, | |
578 | PCI_REQ_SLOT_DISABLE); | |
579 | leaving: | |
580 | /* Release the bus lock */ | |
14cc3e2b | 581 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
582 | |
583 | return rc; | |
584 | } | |
585 | ||
1d2450a4 PB |
586 | static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot, |
587 | u8 *value) | |
6f354b01 | 588 | { |
1d2450a4 PB |
589 | struct slot *slot = bss_hotplug_slot->private; |
590 | struct pcibus_info *pcibus_info; | |
466ee36b | 591 | u32 power; |
1d2450a4 PB |
592 | |
593 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
14cc3e2b | 594 | mutex_lock(&sn_hotplug_mutex); |
466ee36b MH |
595 | power = pcibus_info->pbi_enabled_devices & (1 << slot->device_num); |
596 | *value = power ? 1 : 0; | |
14cc3e2b | 597 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
598 | return 0; |
599 | } | |
600 | ||
601 | static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot) | |
602 | { | |
603 | kfree(bss_hotplug_slot->info); | |
6f354b01 PB |
604 | kfree(bss_hotplug_slot->private); |
605 | kfree(bss_hotplug_slot); | |
606 | } | |
607 | ||
608 | static int sn_hotplug_slot_register(struct pci_bus *pci_bus) | |
609 | { | |
610 | int device; | |
f46753c5 | 611 | struct pci_slot *pci_slot; |
6f354b01 | 612 | struct hotplug_slot *bss_hotplug_slot; |
85234ce8 | 613 | char name[SN_SLOT_NAME_SIZE]; |
6f354b01 PB |
614 | int rc = 0; |
615 | ||
616 | /* | |
617 | * Currently only four devices are supported, | |
618 | * in the future there maybe more -- up to 32. | |
619 | */ | |
620 | ||
621 | for (device = 0; device < SN_MAX_HP_SLOTS ; device++) { | |
622 | if (sn_pci_slot_valid(pci_bus, device) != 1) | |
623 | continue; | |
624 | ||
656da9da | 625 | bss_hotplug_slot = kzalloc(sizeof(*bss_hotplug_slot), |
6f354b01 PB |
626 | GFP_KERNEL); |
627 | if (!bss_hotplug_slot) { | |
628 | rc = -ENOMEM; | |
629 | goto alloc_err; | |
630 | } | |
631 | ||
632 | bss_hotplug_slot->info = | |
656da9da | 633 | kzalloc(sizeof(struct hotplug_slot_info), |
6f354b01 PB |
634 | GFP_KERNEL); |
635 | if (!bss_hotplug_slot->info) { | |
636 | rc = -ENOMEM; | |
637 | goto alloc_err; | |
638 | } | |
639 | ||
640 | if (sn_hp_slot_private_alloc(bss_hotplug_slot, | |
85234ce8 | 641 | pci_bus, device, name)) { |
6f354b01 PB |
642 | rc = -ENOMEM; |
643 | goto alloc_err; | |
644 | } | |
6f354b01 PB |
645 | bss_hotplug_slot->ops = &sn_hotplug_slot_ops; |
646 | bss_hotplug_slot->release = &sn_release_slot; | |
647 | ||
85234ce8 | 648 | rc = pci_hp_register(bss_hotplug_slot, pci_bus, device, name); |
6f354b01 PB |
649 | if (rc) |
650 | goto register_err; | |
1d2450a4 | 651 | |
f46753c5 AC |
652 | pci_slot = bss_hotplug_slot->pci_slot; |
653 | rc = sysfs_create_file(&pci_slot->kobj, | |
1d2450a4 PB |
654 | &sn_slot_path_attr.attr); |
655 | if (rc) | |
656 | goto register_err; | |
6f354b01 | 657 | } |
34ef30ca | 658 | dev_dbg(&pci_bus->self->dev, "Registered bus with hotplug\n"); |
6f354b01 PB |
659 | return rc; |
660 | ||
661 | register_err: | |
34ef30ca | 662 | dev_dbg(&pci_bus->self->dev, "bus failed to register with err = %d\n", |
8344b568 | 663 | rc); |
6f354b01 PB |
664 | |
665 | alloc_err: | |
666 | if (rc == -ENOMEM) | |
34ef30ca | 667 | dev_dbg(&pci_bus->self->dev, "Memory allocation error\n"); |
6f354b01 PB |
668 | |
669 | /* destroy THIS element */ | |
670 | if (bss_hotplug_slot) | |
671 | sn_release_slot(bss_hotplug_slot); | |
672 | ||
673 | /* destroy anything else on the list */ | |
674 | while ((bss_hotplug_slot = sn_hp_destroy())) | |
675 | pci_hp_deregister(bss_hotplug_slot); | |
676 | ||
677 | return rc; | |
678 | } | |
679 | ||
db5ed9be | 680 | static int __init sn_pci_hotplug_init(void) |
6f354b01 PB |
681 | { |
682 | struct pci_bus *pci_bus = NULL; | |
683 | int rc; | |
684 | int registered = 0; | |
685 | ||
e55dea58 PB |
686 | if (!sn_prom_feature_available(PRF_HOTPLUG_SUPPORT)) { |
687 | printk(KERN_ERR "%s: PROM version does not support hotplug.\n", | |
66bef8c0 | 688 | __func__); |
6f354b01 PB |
689 | return -EPERM; |
690 | } | |
691 | ||
1d2450a4 PB |
692 | INIT_LIST_HEAD(&sn_hp_list); |
693 | ||
6f354b01 PB |
694 | while ((pci_bus = pci_find_next_bus(pci_bus))) { |
695 | if (!pci_bus->sysdata) | |
696 | continue; | |
697 | ||
698 | rc = sn_pci_bus_valid(pci_bus); | |
699 | if (rc != 1) { | |
34ef30ca | 700 | dev_dbg(&pci_bus->self->dev, "not a valid hotplug bus\n"); |
6f354b01 PB |
701 | continue; |
702 | } | |
34ef30ca | 703 | dev_dbg(&pci_bus->self->dev, "valid hotplug bus\n"); |
6f354b01 PB |
704 | |
705 | rc = sn_hotplug_slot_register(pci_bus); | |
1d2450a4 | 706 | if (!rc) { |
6f354b01 | 707 | registered = 1; |
1d2450a4 | 708 | } else { |
6f354b01 PB |
709 | registered = 0; |
710 | break; | |
711 | } | |
712 | } | |
713 | ||
714 | return registered == 1 ? 0 : -ENODEV; | |
715 | } | |
716 | ||
db5ed9be | 717 | static void __exit sn_pci_hotplug_exit(void) |
6f354b01 PB |
718 | { |
719 | struct hotplug_slot *bss_hotplug_slot; | |
720 | ||
1d2450a4 | 721 | while ((bss_hotplug_slot = sn_hp_destroy())) |
6f354b01 | 722 | pci_hp_deregister(bss_hotplug_slot); |
6f354b01 PB |
723 | |
724 | if (!list_empty(&sn_hp_list)) | |
725 | printk(KERN_ERR "%s: internal list is not empty\n", __FILE__); | |
726 | } | |
727 | ||
728 | module_init(sn_pci_hotplug_init); | |
729 | module_exit(sn_pci_hotplug_exit); |