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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 | ||
7b199811 | 12 | #include <linux/acpi.h> |
6f354b01 PB |
13 | #include <linux/init.h> |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/pci.h> | |
7a54f25c | 17 | #include <linux/pci_hotplug.h> |
6f354b01 | 18 | #include <linux/proc_fs.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
6f354b01 | 20 | #include <linux/types.h> |
14cc3e2b | 21 | #include <linux/mutex.h> |
6f354b01 PB |
22 | |
23 | #include <asm/sn/addrs.h> | |
e55dea58 | 24 | #include <asm/sn/geo.h> |
6f354b01 PB |
25 | #include <asm/sn/l1.h> |
26 | #include <asm/sn/module.h> | |
27 | #include <asm/sn/pcibr_provider.h> | |
28 | #include <asm/sn/pcibus_provider_defs.h> | |
29 | #include <asm/sn/pcidev.h> | |
e55dea58 | 30 | #include <asm/sn/sn_feature_sets.h> |
6f354b01 PB |
31 | #include <asm/sn/sn_sal.h> |
32 | #include <asm/sn/types.h> | |
3e643e77 | 33 | #include <asm/sn/acpi.h> |
6f354b01 PB |
34 | |
35 | #include "../pci.h" | |
6f354b01 PB |
36 | |
37 | MODULE_LICENSE("GPL"); | |
38 | MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)"); | |
39 | MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver"); | |
40 | ||
3e643e77 JK |
41 | |
42 | /* SAL call error codes. Keep in sync with prom header io/include/pcibr.h */ | |
1d2450a4 PB |
43 | #define PCI_SLOT_ALREADY_UP 2 /* slot already up */ |
44 | #define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */ | |
45 | #define PCI_L1_ERR 7 /* L1 console command error */ | |
46 | #define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */ | |
3e643e77 JK |
47 | |
48 | ||
49 | #define PCIIO_ASIC_TYPE_TIOCA 4 | |
1d2450a4 PB |
50 | #define PCI_L1_QSIZE 128 /* our L1 message buffer size */ |
51 | #define SN_MAX_HP_SLOTS 32 /* max hotplug slots */ | |
1d2450a4 | 52 | #define SN_SLOT_NAME_SIZE 33 /* size of name string */ |
6f354b01 PB |
53 | |
54 | /* internal list head */ | |
55 | static struct list_head sn_hp_list; | |
56 | ||
57 | /* hotplug_slot struct's private pointer */ | |
58 | struct slot { | |
59 | int device_num; | |
60 | struct pci_bus *pci_bus; | |
61 | /* this struct for glue internal only */ | |
62 | struct hotplug_slot *hotplug_slot; | |
63 | struct list_head hp_list; | |
1d2450a4 | 64 | char physical_path[SN_SLOT_NAME_SIZE]; |
6f354b01 PB |
65 | }; |
66 | ||
67 | struct pcibr_slot_enable_resp { | |
68 | int resp_sub_errno; | |
69 | char resp_l1_msg[PCI_L1_QSIZE + 1]; | |
70 | }; | |
71 | ||
72 | struct pcibr_slot_disable_resp { | |
73 | int resp_sub_errno; | |
74 | char resp_l1_msg[PCI_L1_QSIZE + 1]; | |
75 | }; | |
76 | ||
77 | enum sn_pci_req_e { | |
78 | PCI_REQ_SLOT_ELIGIBLE, | |
79 | PCI_REQ_SLOT_DISABLE | |
80 | }; | |
81 | ||
82 | static int enable_slot(struct hotplug_slot *slot); | |
83 | static int disable_slot(struct hotplug_slot *slot); | |
1d2450a4 | 84 | static inline int get_power_status(struct hotplug_slot *slot, u8 *value); |
6f354b01 PB |
85 | |
86 | static struct hotplug_slot_ops sn_hotplug_slot_ops = { | |
6f354b01 PB |
87 | .enable_slot = enable_slot, |
88 | .disable_slot = disable_slot, | |
89 | .get_power_status = get_power_status, | |
90 | }; | |
91 | ||
14cc3e2b | 92 | static DEFINE_MUTEX(sn_hotplug_mutex); |
6f354b01 | 93 | |
94f81a47 | 94 | static ssize_t path_show(struct pci_slot *pci_slot, char *buf) |
1d2450a4 PB |
95 | { |
96 | int retval = -ENOENT; | |
94f81a47 | 97 | struct slot *slot = pci_slot->hotplug->private; |
1d2450a4 PB |
98 | |
99 | if (!slot) | |
100 | return retval; | |
101 | ||
ff3ce480 | 102 | retval = sprintf(buf, "%s\n", slot->physical_path); |
1d2450a4 PB |
103 | return retval; |
104 | } | |
105 | ||
94f81a47 | 106 | static struct pci_slot_attribute sn_slot_path_attr = __ATTR_RO(path); |
1d2450a4 | 107 | |
6f354b01 PB |
108 | static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device) |
109 | { | |
110 | struct pcibus_info *pcibus_info; | |
e55dea58 | 111 | u16 busnum, segment, ioboard_type; |
6f354b01 PB |
112 | |
113 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); | |
114 | ||
115 | /* Check to see if this is a valid slot on 'pci_bus' */ | |
116 | if (!(pcibus_info->pbi_valid_devices & (1 << device))) | |
117 | return -EPERM; | |
118 | ||
e55dea58 PB |
119 | ioboard_type = sn_ioboard_to_pci_bus(pci_bus); |
120 | busnum = pcibus_info->pbi_buscommon.bs_persist_busnum; | |
121 | segment = pci_domain_nr(pci_bus) & 0xf; | |
6f354b01 PB |
122 | |
123 | /* Do not allow hotplug operations on base I/O cards */ | |
e55dea58 PB |
124 | if ((ioboard_type == L1_BRICKTYPE_IX || |
125 | ioboard_type == L1_BRICKTYPE_IA) && | |
126 | (segment == 1 && busnum == 0 && device != 1)) | |
6f354b01 PB |
127 | return -EPERM; |
128 | ||
129 | return 1; | |
130 | } | |
131 | ||
132 | static int sn_pci_bus_valid(struct pci_bus *pci_bus) | |
133 | { | |
134 | struct pcibus_info *pcibus_info; | |
e55dea58 PB |
135 | u32 asic_type; |
136 | u16 ioboard_type; | |
6f354b01 PB |
137 | |
138 | /* Don't register slots hanging off the TIOCA bus */ | |
e55dea58 | 139 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); |
6f354b01 PB |
140 | asic_type = pcibus_info->pbi_buscommon.bs_asic_type; |
141 | if (asic_type == PCIIO_ASIC_TYPE_TIOCA) | |
142 | return -EPERM; | |
143 | ||
144 | /* Only register slots in I/O Bricks that support hotplug */ | |
e55dea58 PB |
145 | ioboard_type = sn_ioboard_to_pci_bus(pci_bus); |
146 | switch (ioboard_type) { | |
1d2450a4 PB |
147 | case L1_BRICKTYPE_IX: |
148 | case L1_BRICKTYPE_PX: | |
149 | case L1_BRICKTYPE_IA: | |
150 | case L1_BRICKTYPE_PA: | |
e55dea58 | 151 | case L1_BOARDTYPE_PCIX3SLOT: |
1d2450a4 PB |
152 | return 1; |
153 | break; | |
154 | default: | |
155 | return -EPERM; | |
156 | break; | |
6f354b01 PB |
157 | } |
158 | ||
159 | return -EIO; | |
160 | } | |
161 | ||
162 | static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, | |
85234ce8 AC |
163 | struct pci_bus *pci_bus, int device, |
164 | char *name) | |
6f354b01 PB |
165 | { |
166 | struct pcibus_info *pcibus_info; | |
167 | struct slot *slot; | |
168 | ||
169 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus); | |
170 | ||
656da9da | 171 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
1d2450a4 | 172 | if (!slot) |
6f354b01 | 173 | return -ENOMEM; |
1d2450a4 | 174 | bss_hotplug_slot->private = slot; |
6f354b01 | 175 | |
6f354b01 PB |
176 | slot->device_num = device; |
177 | slot->pci_bus = pci_bus; | |
85234ce8 | 178 | sprintf(name, "%04x:%02x:%02x", |
1d2450a4 | 179 | pci_domain_nr(pci_bus), |
e55dea58 | 180 | ((u16)pcibus_info->pbi_buscommon.bs_persist_busnum), |
1d2450a4 | 181 | device + 1); |
e55dea58 PB |
182 | |
183 | sn_generate_path(pci_bus, slot->physical_path); | |
184 | ||
6f354b01 PB |
185 | slot->hotplug_slot = bss_hotplug_slot; |
186 | list_add(&slot->hp_list, &sn_hp_list); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
3c78bc61 | 191 | static struct hotplug_slot *sn_hp_destroy(void) |
6f354b01 PB |
192 | { |
193 | struct slot *slot; | |
f46753c5 | 194 | struct pci_slot *pci_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 | 198 | bss_hotplug_slot = slot->hotplug_slot; |
f46753c5 | 199 | pci_slot = bss_hotplug_slot->pci_slot; |
6f354b01 PB |
200 | list_del(&((struct slot *)bss_hotplug_slot->private)-> |
201 | hp_list); | |
f46753c5 | 202 | sysfs_remove_file(&pci_slot->kobj, |
1d2450a4 | 203 | &sn_slot_path_attr.attr); |
6f354b01 PB |
204 | break; |
205 | } | |
206 | return bss_hotplug_slot; | |
207 | } | |
208 | ||
6f354b01 PB |
209 | static void sn_bus_free_data(struct pci_dev *dev) |
210 | { | |
6f354b01 PB |
211 | struct pci_bus *subordinate_bus; |
212 | struct pci_dev *child; | |
213 | ||
214 | /* Recursively clean up sn_irq_info structs */ | |
215 | if (dev->subordinate) { | |
216 | subordinate_bus = dev->subordinate; | |
1d2450a4 | 217 | list_for_each_entry(child, &subordinate_bus->devices, bus_list) |
6f354b01 | 218 | sn_bus_free_data(child); |
6f354b01 | 219 | } |
8e77af6a JK |
220 | /* |
221 | * Some drivers may use dma accesses during the | |
222 | * driver remove function. We release the sysdata | |
223 | * areas after the driver remove functions have | |
224 | * been called. | |
225 | */ | |
226 | sn_bus_store_sysdata(dev); | |
6f354b01 PB |
227 | sn_pci_unfixup_slot(dev); |
228 | } | |
229 | ||
6f354b01 | 230 | static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, |
3e643e77 | 231 | int device_num, char **ssdt) |
6f354b01 | 232 | { |
1d2450a4 | 233 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
234 | struct pcibus_info *pcibus_info; |
235 | struct pcibr_slot_enable_resp resp; | |
236 | int rc; | |
237 | ||
238 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
239 | ||
240 | /* | |
241 | * Power-on and initialize the slot in the SN | |
242 | * PCI infrastructure. | |
243 | */ | |
3e643e77 JK |
244 | rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp, ssdt); |
245 | ||
6f354b01 PB |
246 | |
247 | if (rc == PCI_SLOT_ALREADY_UP) { | |
34ef30ca | 248 | dev_dbg(&slot->pci_bus->self->dev, "is already active\n"); |
1d2450a4 | 249 | return 1; /* return 1 to user */ |
6f354b01 PB |
250 | } |
251 | ||
252 | if (rc == PCI_L1_ERR) { | |
227f0647 | 253 | dev_dbg(&slot->pci_bus->self->dev, "L1 failure %d with message: %s", |
6f354b01 PB |
254 | resp.resp_sub_errno, resp.resp_l1_msg); |
255 | return -EPERM; | |
256 | } | |
257 | ||
258 | if (rc) { | |
227f0647 | 259 | dev_dbg(&slot->pci_bus->self->dev, "insert failed with error %d sub-error %d\n", |
6f354b01 PB |
260 | rc, resp.resp_sub_errno); |
261 | return -EIO; | |
262 | } | |
263 | ||
1d2450a4 PB |
264 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); |
265 | pcibus_info->pbi_enabled_devices |= (1 << device_num); | |
6f354b01 PB |
266 | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, | |
271 | int device_num, int action) | |
272 | { | |
1d2450a4 | 273 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
274 | struct pcibus_info *pcibus_info; |
275 | struct pcibr_slot_disable_resp resp; | |
276 | int rc; | |
277 | ||
278 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
279 | ||
280 | rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp); | |
281 | ||
1d2450a4 PB |
282 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && |
283 | (rc == PCI_SLOT_ALREADY_DOWN)) { | |
34ef30ca | 284 | dev_dbg(&slot->pci_bus->self->dev, "Slot %s already inactive\n", slot->physical_path); |
1d2450a4 | 285 | return 1; /* return 1 to user */ |
6f354b01 PB |
286 | } |
287 | ||
1d2450a4 | 288 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) { |
227f0647 | 289 | dev_dbg(&slot->pci_bus->self->dev, "Cannot remove last 33MHz card\n"); |
6f354b01 PB |
290 | return -EPERM; |
291 | } | |
292 | ||
1d2450a4 | 293 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) { |
227f0647 | 294 | dev_dbg(&slot->pci_bus->self->dev, "L1 failure %d with message \n%s\n", |
6f354b01 PB |
295 | resp.resp_sub_errno, resp.resp_l1_msg); |
296 | return -EPERM; | |
297 | } | |
298 | ||
1d2450a4 | 299 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) { |
227f0647 | 300 | dev_dbg(&slot->pci_bus->self->dev, "remove failed with error %d sub-error %d\n", |
6f354b01 PB |
301 | rc, resp.resp_sub_errno); |
302 | return -EIO; | |
303 | } | |
304 | ||
1d2450a4 | 305 | if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc) |
6f354b01 PB |
306 | return 0; |
307 | ||
1d2450a4 PB |
308 | if ((action == PCI_REQ_SLOT_DISABLE) && !rc) { |
309 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
310 | pcibus_info->pbi_enabled_devices &= ~(1 << device_num); | |
34ef30ca | 311 | dev_dbg(&slot->pci_bus->self->dev, "remove successful\n"); |
6f354b01 PB |
312 | return 0; |
313 | } | |
314 | ||
1d2450a4 | 315 | if ((action == PCI_REQ_SLOT_DISABLE) && rc) { |
ff3ce480 | 316 | dev_dbg(&slot->pci_bus->self->dev, "remove failed rc = %d\n", rc); |
6f354b01 PB |
317 | } |
318 | ||
319 | return rc; | |
320 | } | |
321 | ||
9f581f16 JK |
322 | /* |
323 | * Power up and configure the slot via a SAL call to PROM. | |
324 | * Scan slot (and any children), do any platform specific fixup, | |
325 | * and find device driver. | |
326 | */ | |
6f354b01 PB |
327 | static int enable_slot(struct hotplug_slot *bss_hotplug_slot) |
328 | { | |
1d2450a4 | 329 | struct slot *slot = bss_hotplug_slot->private; |
6f354b01 PB |
330 | struct pci_bus *new_bus = NULL; |
331 | struct pci_dev *dev; | |
ab6380ef | 332 | int num_funcs; |
6f354b01 PB |
333 | int new_ppb = 0; |
334 | int rc; | |
3e643e77 | 335 | char *ssdt = NULL; |
9f581f16 | 336 | void pcibios_fixup_device_resources(struct pci_dev *); |
6f354b01 PB |
337 | |
338 | /* Serialize the Linux PCI infrastructure */ | |
14cc3e2b | 339 | mutex_lock(&sn_hotplug_mutex); |
6f354b01 PB |
340 | |
341 | /* | |
342 | * Power-on and initialize the slot in the SN | |
3e643e77 JK |
343 | * PCI infrastructure. Also, retrieve the ACPI SSDT |
344 | * table for the slot (if ACPI capable PROM). | |
6f354b01 | 345 | */ |
3e643e77 | 346 | rc = sn_slot_enable(bss_hotplug_slot, slot->device_num, &ssdt); |
6f354b01 | 347 | if (rc) { |
14cc3e2b | 348 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
349 | return rc; |
350 | } | |
351 | ||
3e643e77 JK |
352 | if (ssdt) |
353 | ssdt = __va(ssdt); | |
354 | /* Add the new SSDT for the slot to the ACPI namespace */ | |
355 | if (SN_ACPI_BASE_SUPPORT() && ssdt) { | |
356 | acpi_status ret; | |
357 | ||
358 | ret = acpi_load_table((struct acpi_table_header *)ssdt); | |
359 | if (ACPI_FAILURE(ret)) { | |
360 | printk(KERN_ERR "%s: acpi_load_table failed (0x%x)\n", | |
66bef8c0 | 361 | __func__, ret); |
3e643e77 JK |
362 | /* try to continue on */ |
363 | } | |
364 | } | |
365 | ||
1d2450a4 PB |
366 | num_funcs = pci_scan_slot(slot->pci_bus, |
367 | PCI_DEVFN(slot->device_num + 1, 0)); | |
6f354b01 | 368 | if (!num_funcs) { |
34ef30ca | 369 | dev_dbg(&slot->pci_bus->self->dev, "no device in slot\n"); |
14cc3e2b | 370 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
371 | return -ENODEV; |
372 | } | |
373 | ||
6f354b01 PB |
374 | /* |
375 | * Map SN resources for all functions on the card | |
376 | * to the Linux PCI interface and tell the drivers | |
377 | * about them. | |
378 | */ | |
ab6380ef YW |
379 | list_for_each_entry(dev, &slot->pci_bus->devices, bus_list) { |
380 | if (PCI_SLOT(dev->devfn) != slot->device_num + 1) | |
381 | continue; | |
382 | ||
383 | /* Need to do slot fixup on PPB before fixup of children | |
384 | * (PPB's pcidev_info needs to be in pcidev_info list | |
385 | * before child's SN_PCIDEV_INFO() call to setup | |
386 | * pdi_host_pcidev_info). | |
387 | */ | |
388 | pcibios_fixup_device_resources(dev); | |
389 | if (SN_ACPI_BASE_SUPPORT()) | |
390 | sn_acpi_slot_fixup(dev); | |
391 | else | |
392 | sn_io_slot_fixup(dev); | |
393 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { | |
394 | pci_hp_add_bridge(dev); | |
395 | if (dev->subordinate) { | |
396 | new_bus = dev->subordinate; | |
397 | new_ppb = 1; | |
6f354b01 | 398 | } |
6f354b01 PB |
399 | } |
400 | } | |
401 | ||
3e643e77 JK |
402 | /* |
403 | * Add the slot's devices to the ACPI infrastructure */ | |
404 | if (SN_ACPI_BASE_SUPPORT() && ssdt) { | |
27663c58 | 405 | unsigned long long adr; |
3e643e77 | 406 | struct acpi_device *pdevice; |
3e643e77 JK |
407 | acpi_handle phandle; |
408 | acpi_handle chandle = NULL; | |
409 | acpi_handle rethandle; | |
410 | acpi_status ret; | |
411 | ||
7b199811 | 412 | phandle = acpi_device_handle(PCI_CONTROLLER(slot->pci_bus)->companion); |
3e643e77 JK |
413 | |
414 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
227f0647 | 415 | dev_dbg(&slot->pci_bus->self->dev, "no parent device, assuming NULL\n"); |
3e643e77 JK |
416 | pdevice = NULL; |
417 | } | |
418 | ||
3757b948 | 419 | acpi_scan_lock_acquire(); |
3e643e77 JK |
420 | /* |
421 | * Walk the rootbus node's immediate children looking for | |
422 | * the slot's device node(s). There can be more than | |
423 | * one for multifunction devices. | |
424 | */ | |
425 | for (;;) { | |
426 | rethandle = NULL; | |
427 | ret = acpi_get_next_object(ACPI_TYPE_DEVICE, | |
428 | phandle, chandle, | |
429 | &rethandle); | |
430 | ||
431 | if (ret == AE_NOT_FOUND || rethandle == NULL) | |
432 | break; | |
433 | ||
434 | chandle = rethandle; | |
435 | ||
436 | ret = acpi_evaluate_integer(chandle, METHOD_NAME__ADR, | |
437 | NULL, &adr); | |
438 | ||
439 | if (ACPI_SUCCESS(ret) && | |
440 | (adr>>16) == (slot->device_num + 1)) { | |
441 | ||
b8bd759a | 442 | ret = acpi_bus_scan(chandle); |
3e643e77 | 443 | if (ACPI_FAILURE(ret)) { |
227f0647 RD |
444 | printk(KERN_ERR "%s: acpi_bus_scan failed (0x%x) for slot %d func %d\n", |
445 | __func__, ret, (int)(adr>>16), | |
3e643e77 JK |
446 | (int)(adr&0xffff)); |
447 | /* try to continue on */ | |
3e643e77 JK |
448 | } |
449 | } | |
450 | } | |
3757b948 | 451 | acpi_scan_lock_release(); |
3e643e77 JK |
452 | } |
453 | ||
c4ec84c7 RW |
454 | pci_lock_rescan_remove(); |
455 | ||
6f354b01 PB |
456 | /* Call the driver for the new device */ |
457 | pci_bus_add_devices(slot->pci_bus); | |
458 | /* Call the drivers for the new devices subordinate to PPB */ | |
459 | if (new_ppb) | |
460 | pci_bus_add_devices(new_bus); | |
461 | ||
c4ec84c7 | 462 | pci_unlock_rescan_remove(); |
14cc3e2b | 463 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
464 | |
465 | if (rc == 0) | |
227f0647 | 466 | dev_dbg(&slot->pci_bus->self->dev, "insert operation successful\n"); |
6f354b01 | 467 | else |
227f0647 | 468 | dev_dbg(&slot->pci_bus->self->dev, "insert operation failed rc = %d\n", rc); |
6f354b01 PB |
469 | |
470 | return rc; | |
471 | } | |
472 | ||
473 | static int disable_slot(struct hotplug_slot *bss_hotplug_slot) | |
474 | { | |
1d2450a4 | 475 | struct slot *slot = bss_hotplug_slot->private; |
ab6380ef | 476 | struct pci_dev *dev, *temp; |
6f354b01 | 477 | int rc; |
e044d8f9 | 478 | acpi_handle ssdt_hdl = NULL; |
6f354b01 PB |
479 | |
480 | /* Acquire update access to the bus */ | |
14cc3e2b | 481 | mutex_lock(&sn_hotplug_mutex); |
6f354b01 PB |
482 | |
483 | /* is it okay to bring this slot down? */ | |
484 | rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, | |
485 | PCI_REQ_SLOT_ELIGIBLE); | |
486 | if (rc) | |
487 | goto leaving; | |
488 | ||
3e643e77 JK |
489 | /* free the ACPI resources for the slot */ |
490 | if (SN_ACPI_BASE_SUPPORT() && | |
ff3ce480 | 491 | PCI_CONTROLLER(slot->pci_bus)->companion) { |
27663c58 | 492 | unsigned long long adr; |
3e643e77 JK |
493 | struct acpi_device *device; |
494 | acpi_handle phandle; | |
495 | acpi_handle chandle = NULL; | |
496 | acpi_handle rethandle; | |
497 | acpi_status ret; | |
498 | ||
499 | /* Get the rootbus node pointer */ | |
7b199811 | 500 | phandle = acpi_device_handle(PCI_CONTROLLER(slot->pci_bus)->companion); |
3e643e77 | 501 | |
3757b948 | 502 | acpi_scan_lock_acquire(); |
3e643e77 JK |
503 | /* |
504 | * Walk the rootbus node's immediate children looking for | |
505 | * the slot's device node(s). There can be more than | |
506 | * one for multifunction devices. | |
507 | */ | |
508 | for (;;) { | |
509 | rethandle = NULL; | |
510 | ret = acpi_get_next_object(ACPI_TYPE_DEVICE, | |
511 | phandle, chandle, | |
512 | &rethandle); | |
513 | ||
514 | if (ret == AE_NOT_FOUND || rethandle == NULL) | |
515 | break; | |
516 | ||
517 | chandle = rethandle; | |
518 | ||
519 | ret = acpi_evaluate_integer(chandle, | |
520 | METHOD_NAME__ADR, | |
521 | NULL, &adr); | |
522 | if (ACPI_SUCCESS(ret) && | |
523 | (adr>>16) == (slot->device_num + 1)) { | |
524 | /* retain the owner id */ | |
e044d8f9 | 525 | ssdt_hdl = chandle; |
3e643e77 JK |
526 | |
527 | ret = acpi_bus_get_device(chandle, | |
528 | &device); | |
529 | if (ACPI_SUCCESS(ret)) | |
ae281795 | 530 | acpi_bus_trim(device); |
3e643e77 JK |
531 | } |
532 | } | |
3757b948 | 533 | acpi_scan_lock_release(); |
3e643e77 JK |
534 | } |
535 | ||
c4ec84c7 | 536 | pci_lock_rescan_remove(); |
6f354b01 | 537 | /* Free the SN resources assigned to the Linux device.*/ |
ab6380ef YW |
538 | list_for_each_entry_safe(dev, temp, &slot->pci_bus->devices, bus_list) { |
539 | if (PCI_SLOT(dev->devfn) != slot->device_num + 1) | |
540 | continue; | |
541 | ||
542 | pci_dev_get(dev); | |
543 | sn_bus_free_data(dev); | |
544 | pci_stop_and_remove_bus_device(dev); | |
545 | pci_dev_put(dev); | |
6f354b01 | 546 | } |
c4ec84c7 | 547 | pci_unlock_rescan_remove(); |
6f354b01 | 548 | |
3e643e77 | 549 | /* Remove the SSDT for the slot from the ACPI namespace */ |
e044d8f9 | 550 | if (SN_ACPI_BASE_SUPPORT() && ssdt_hdl) { |
3e643e77 | 551 | acpi_status ret; |
e044d8f9 | 552 | ret = acpi_unload_parent_table(ssdt_hdl); |
3e643e77 | 553 | if (ACPI_FAILURE(ret)) { |
e044d8f9 LZ |
554 | acpi_handle_err(ssdt_hdl, |
555 | "%s: acpi_unload_parent_table failed (0x%x)\n", | |
556 | __func__, ret); | |
3e643e77 JK |
557 | /* try to continue on */ |
558 | } | |
559 | } | |
560 | ||
6f354b01 PB |
561 | /* free the collected sysdata pointers */ |
562 | sn_bus_free_sysdata(); | |
563 | ||
564 | /* Deactivate slot */ | |
565 | rc = sn_slot_disable(bss_hotplug_slot, slot->device_num, | |
566 | PCI_REQ_SLOT_DISABLE); | |
567 | leaving: | |
568 | /* Release the bus lock */ | |
14cc3e2b | 569 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
570 | |
571 | return rc; | |
572 | } | |
573 | ||
1d2450a4 PB |
574 | static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot, |
575 | u8 *value) | |
6f354b01 | 576 | { |
1d2450a4 PB |
577 | struct slot *slot = bss_hotplug_slot->private; |
578 | struct pcibus_info *pcibus_info; | |
466ee36b | 579 | u32 power; |
1d2450a4 PB |
580 | |
581 | pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus); | |
14cc3e2b | 582 | mutex_lock(&sn_hotplug_mutex); |
466ee36b MH |
583 | power = pcibus_info->pbi_enabled_devices & (1 << slot->device_num); |
584 | *value = power ? 1 : 0; | |
14cc3e2b | 585 | mutex_unlock(&sn_hotplug_mutex); |
6f354b01 PB |
586 | return 0; |
587 | } | |
588 | ||
589 | static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot) | |
590 | { | |
591 | kfree(bss_hotplug_slot->info); | |
6f354b01 PB |
592 | kfree(bss_hotplug_slot->private); |
593 | kfree(bss_hotplug_slot); | |
594 | } | |
595 | ||
596 | static int sn_hotplug_slot_register(struct pci_bus *pci_bus) | |
597 | { | |
598 | int device; | |
f46753c5 | 599 | struct pci_slot *pci_slot; |
6f354b01 | 600 | struct hotplug_slot *bss_hotplug_slot; |
85234ce8 | 601 | char name[SN_SLOT_NAME_SIZE]; |
6f354b01 PB |
602 | int rc = 0; |
603 | ||
604 | /* | |
605 | * Currently only four devices are supported, | |
606 | * in the future there maybe more -- up to 32. | |
607 | */ | |
608 | ||
609 | for (device = 0; device < SN_MAX_HP_SLOTS ; device++) { | |
610 | if (sn_pci_slot_valid(pci_bus, device) != 1) | |
611 | continue; | |
612 | ||
656da9da | 613 | bss_hotplug_slot = kzalloc(sizeof(*bss_hotplug_slot), |
6f354b01 PB |
614 | GFP_KERNEL); |
615 | if (!bss_hotplug_slot) { | |
616 | rc = -ENOMEM; | |
617 | goto alloc_err; | |
618 | } | |
619 | ||
620 | bss_hotplug_slot->info = | |
656da9da | 621 | kzalloc(sizeof(struct hotplug_slot_info), |
6f354b01 PB |
622 | GFP_KERNEL); |
623 | if (!bss_hotplug_slot->info) { | |
624 | rc = -ENOMEM; | |
625 | goto alloc_err; | |
626 | } | |
627 | ||
628 | if (sn_hp_slot_private_alloc(bss_hotplug_slot, | |
85234ce8 | 629 | pci_bus, device, name)) { |
6f354b01 PB |
630 | rc = -ENOMEM; |
631 | goto alloc_err; | |
632 | } | |
6f354b01 PB |
633 | bss_hotplug_slot->ops = &sn_hotplug_slot_ops; |
634 | bss_hotplug_slot->release = &sn_release_slot; | |
635 | ||
85234ce8 | 636 | rc = pci_hp_register(bss_hotplug_slot, pci_bus, device, name); |
6f354b01 PB |
637 | if (rc) |
638 | goto register_err; | |
1d2450a4 | 639 | |
f46753c5 AC |
640 | pci_slot = bss_hotplug_slot->pci_slot; |
641 | rc = sysfs_create_file(&pci_slot->kobj, | |
1d2450a4 PB |
642 | &sn_slot_path_attr.attr); |
643 | if (rc) | |
644 | goto register_err; | |
6f354b01 | 645 | } |
34ef30ca | 646 | dev_dbg(&pci_bus->self->dev, "Registered bus with hotplug\n"); |
6f354b01 PB |
647 | return rc; |
648 | ||
649 | register_err: | |
34ef30ca | 650 | dev_dbg(&pci_bus->self->dev, "bus failed to register with err = %d\n", |
8344b568 | 651 | rc); |
6f354b01 PB |
652 | |
653 | alloc_err: | |
654 | if (rc == -ENOMEM) | |
34ef30ca | 655 | dev_dbg(&pci_bus->self->dev, "Memory allocation error\n"); |
6f354b01 PB |
656 | |
657 | /* destroy THIS element */ | |
658 | if (bss_hotplug_slot) | |
659 | sn_release_slot(bss_hotplug_slot); | |
660 | ||
661 | /* destroy anything else on the list */ | |
662 | while ((bss_hotplug_slot = sn_hp_destroy())) | |
663 | pci_hp_deregister(bss_hotplug_slot); | |
664 | ||
665 | return rc; | |
666 | } | |
667 | ||
db5ed9be | 668 | static int __init sn_pci_hotplug_init(void) |
6f354b01 PB |
669 | { |
670 | struct pci_bus *pci_bus = NULL; | |
671 | int rc; | |
672 | int registered = 0; | |
673 | ||
e55dea58 PB |
674 | if (!sn_prom_feature_available(PRF_HOTPLUG_SUPPORT)) { |
675 | printk(KERN_ERR "%s: PROM version does not support hotplug.\n", | |
66bef8c0 | 676 | __func__); |
6f354b01 PB |
677 | return -EPERM; |
678 | } | |
679 | ||
1d2450a4 PB |
680 | INIT_LIST_HEAD(&sn_hp_list); |
681 | ||
6f354b01 PB |
682 | while ((pci_bus = pci_find_next_bus(pci_bus))) { |
683 | if (!pci_bus->sysdata) | |
684 | continue; | |
685 | ||
686 | rc = sn_pci_bus_valid(pci_bus); | |
687 | if (rc != 1) { | |
34ef30ca | 688 | dev_dbg(&pci_bus->self->dev, "not a valid hotplug bus\n"); |
6f354b01 PB |
689 | continue; |
690 | } | |
34ef30ca | 691 | dev_dbg(&pci_bus->self->dev, "valid hotplug bus\n"); |
6f354b01 PB |
692 | |
693 | rc = sn_hotplug_slot_register(pci_bus); | |
1d2450a4 | 694 | if (!rc) { |
6f354b01 | 695 | registered = 1; |
1d2450a4 | 696 | } else { |
6f354b01 PB |
697 | registered = 0; |
698 | break; | |
699 | } | |
700 | } | |
701 | ||
702 | return registered == 1 ? 0 : -ENODEV; | |
703 | } | |
704 | ||
db5ed9be | 705 | static void __exit sn_pci_hotplug_exit(void) |
6f354b01 PB |
706 | { |
707 | struct hotplug_slot *bss_hotplug_slot; | |
708 | ||
1d2450a4 | 709 | while ((bss_hotplug_slot = sn_hp_destroy())) |
6f354b01 | 710 | pci_hp_deregister(bss_hotplug_slot); |
6f354b01 PB |
711 | |
712 | if (!list_empty(&sn_hp_list)) | |
713 | printk(KERN_ERR "%s: internal list is not empty\n", __FILE__); | |
714 | } | |
715 | ||
716 | module_init(sn_pci_hotplug_init); | |
717 | module_exit(sn_pci_hotplug_exit); |