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1da177e4 LT |
1 | /* |
2 | * PCI Express Hot Plug Controller Driver | |
3 | * | |
4 | * Copyright (C) 1995,2001 Compaq Computer Corporation | |
5 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) | |
6 | * Copyright (C) 2001 IBM Corp. | |
7 | * Copyright (C) 2003-2004 Intel Corporation | |
8 | * | |
9 | * All rights reserved. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
19 | * NON INFRINGEMENT. See the GNU General Public License for more | |
20 | * details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/types.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
34 | #include <linux/pci.h> |
35 | #include "../pci.h" | |
36 | #include "pciehp.h" | |
1da177e4 | 37 | |
5d386e1a | 38 | static void interrupt_event_handler(struct work_struct *work); |
1da177e4 | 39 | |
5d386e1a | 40 | static int queue_interrupt_event(struct slot *p_slot, u32 event_type) |
49ed2b49 | 41 | { |
5d386e1a KK |
42 | struct event_info *info; |
43 | ||
44 | info = kmalloc(sizeof(*info), GFP_ATOMIC); | |
45 | if (!info) | |
46 | return -ENOMEM; | |
47 | ||
48 | info->event_type = event_type; | |
49 | info->p_slot = p_slot; | |
50 | INIT_WORK(&info->work, interrupt_event_handler); | |
51 | ||
c2be6f93 | 52 | queue_work(p_slot->wq, &info->work); |
5d386e1a KK |
53 | |
54 | return 0; | |
49ed2b49 KK |
55 | } |
56 | ||
dbd79aed | 57 | u8 pciehp_handle_attention_button(struct slot *p_slot) |
1da177e4 | 58 | { |
5d386e1a | 59 | u32 event_type; |
7f2feec1 | 60 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 LT |
61 | |
62 | /* Attention Button Change */ | |
18b341b7 | 63 | ctrl_dbg(ctrl, "Attention button interrupt received\n"); |
1da177e4 | 64 | |
1da177e4 LT |
65 | /* |
66 | * Button pressed - See if need to TAKE ACTION!!! | |
67 | */ | |
e1acb24f | 68 | ctrl_info(ctrl, "Button pressed on Slot(%s)\n", slot_name(p_slot)); |
5d386e1a | 69 | event_type = INT_BUTTON_PRESS; |
1da177e4 | 70 | |
5d386e1a | 71 | queue_interrupt_event(p_slot, event_type); |
1da177e4 LT |
72 | |
73 | return 0; | |
1da177e4 LT |
74 | } |
75 | ||
dbd79aed | 76 | u8 pciehp_handle_switch_change(struct slot *p_slot) |
1da177e4 | 77 | { |
1da177e4 | 78 | u8 getstatus; |
5d386e1a | 79 | u32 event_type; |
7f2feec1 | 80 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 LT |
81 | |
82 | /* Switch Change */ | |
18b341b7 | 83 | ctrl_dbg(ctrl, "Switch interrupt received\n"); |
1da177e4 | 84 | |
82a9e79e | 85 | pciehp_get_latch_status(p_slot, &getstatus); |
1da177e4 LT |
86 | if (getstatus) { |
87 | /* | |
88 | * Switch opened | |
89 | */ | |
e1acb24f | 90 | ctrl_info(ctrl, "Latch open on Slot(%s)\n", slot_name(p_slot)); |
5d386e1a | 91 | event_type = INT_SWITCH_OPEN; |
1da177e4 LT |
92 | } else { |
93 | /* | |
94 | * Switch closed | |
95 | */ | |
e1acb24f | 96 | ctrl_info(ctrl, "Latch close on Slot(%s)\n", slot_name(p_slot)); |
5d386e1a | 97 | event_type = INT_SWITCH_CLOSE; |
1da177e4 LT |
98 | } |
99 | ||
5d386e1a | 100 | queue_interrupt_event(p_slot, event_type); |
1da177e4 | 101 | |
5d386e1a | 102 | return 1; |
1da177e4 LT |
103 | } |
104 | ||
dbd79aed | 105 | u8 pciehp_handle_presence_change(struct slot *p_slot) |
1da177e4 | 106 | { |
5d386e1a KK |
107 | u32 event_type; |
108 | u8 presence_save; | |
7f2feec1 | 109 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 LT |
110 | |
111 | /* Presence Change */ | |
18b341b7 | 112 | ctrl_dbg(ctrl, "Presence/Notify input change\n"); |
1da177e4 | 113 | |
1da177e4 LT |
114 | /* Switch is open, assume a presence change |
115 | * Save the presence state | |
116 | */ | |
82a9e79e | 117 | pciehp_get_adapter_status(p_slot, &presence_save); |
ed6cbcf2 | 118 | if (presence_save) { |
1da177e4 LT |
119 | /* |
120 | * Card Present | |
121 | */ | |
e1acb24f | 122 | ctrl_info(ctrl, "Card present on Slot(%s)\n", slot_name(p_slot)); |
5d386e1a | 123 | event_type = INT_PRESENCE_ON; |
1da177e4 LT |
124 | } else { |
125 | /* | |
126 | * Not Present | |
127 | */ | |
e1acb24f AC |
128 | ctrl_info(ctrl, "Card not present on Slot(%s)\n", |
129 | slot_name(p_slot)); | |
5d386e1a | 130 | event_type = INT_PRESENCE_OFF; |
1da177e4 LT |
131 | } |
132 | ||
5d386e1a | 133 | queue_interrupt_event(p_slot, event_type); |
1da177e4 | 134 | |
5d386e1a | 135 | return 1; |
1da177e4 LT |
136 | } |
137 | ||
dbd79aed | 138 | u8 pciehp_handle_power_fault(struct slot *p_slot) |
1da177e4 | 139 | { |
5d386e1a | 140 | u32 event_type; |
7f2feec1 | 141 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 LT |
142 | |
143 | /* power fault */ | |
18b341b7 | 144 | ctrl_dbg(ctrl, "Power fault interrupt received\n"); |
5651c48c KK |
145 | ctrl_err(ctrl, "Power fault on slot %s\n", slot_name(p_slot)); |
146 | event_type = INT_POWER_FAULT; | |
147 | ctrl_info(ctrl, "Power fault bit %x set\n", 0); | |
5d386e1a KK |
148 | queue_interrupt_event(p_slot, event_type); |
149 | ||
150 | return 1; | |
1da177e4 LT |
151 | } |
152 | ||
e48f1b67 RJ |
153 | void pciehp_handle_linkstate_change(struct slot *p_slot) |
154 | { | |
155 | u32 event_type; | |
156 | struct controller *ctrl = p_slot->ctrl; | |
157 | ||
158 | /* Link Status Change */ | |
159 | ctrl_dbg(ctrl, "Data Link Layer State change\n"); | |
160 | ||
161 | if (pciehp_check_link_active(ctrl)) { | |
162 | ctrl_info(ctrl, "slot(%s): Link Up event\n", | |
163 | slot_name(p_slot)); | |
164 | event_type = INT_LINK_UP; | |
165 | } else { | |
166 | ctrl_info(ctrl, "slot(%s): Link Down event\n", | |
167 | slot_name(p_slot)); | |
168 | event_type = INT_LINK_DOWN; | |
169 | } | |
170 | ||
171 | queue_interrupt_event(p_slot, event_type); | |
172 | } | |
173 | ||
36ed27b0 | 174 | /* The following routines constitute the bulk of the |
1da177e4 LT |
175 | hotplug controller logic |
176 | */ | |
177 | ||
178 | static void set_slot_off(struct controller *ctrl, struct slot * pslot) | |
179 | { | |
1da177e4 | 180 | /* turn off slot, turn on Amber LED, turn off Green LED if supported*/ |
ae416e6b | 181 | if (POWER_CTRL(ctrl)) { |
6dae6202 BH |
182 | pciehp_power_off_slot(pslot); |
183 | ||
c7b4fee3 KK |
184 | /* |
185 | * After turning power off, we must wait for at least 1 second | |
186 | * before taking any action that relies on power having been | |
187 | * removed from the slot/adapter. | |
188 | */ | |
189 | msleep(1000); | |
1da177e4 LT |
190 | } |
191 | ||
af9ab791 BH |
192 | pciehp_green_led_off(pslot); |
193 | pciehp_set_attention_status(pslot, 1); | |
1da177e4 LT |
194 | } |
195 | ||
196 | /** | |
197 | * board_added - Called after a board has been added to the system. | |
26e6c66e | 198 | * @p_slot: &slot where board is added |
1da177e4 | 199 | * |
26e6c66e RD |
200 | * Turns power on for the board. |
201 | * Configures board. | |
1da177e4 | 202 | */ |
ed6cbcf2 | 203 | static int board_added(struct slot *p_slot) |
1da177e4 | 204 | { |
44ef4cef | 205 | int retval = 0; |
ca22a5e4 | 206 | struct controller *ctrl = p_slot->ctrl; |
385e2491 | 207 | struct pci_bus *parent = ctrl->pcie->port->subordinate; |
1da177e4 | 208 | |
ae416e6b | 209 | if (POWER_CTRL(ctrl)) { |
1da177e4 | 210 | /* Power on slot */ |
82a9e79e | 211 | retval = pciehp_power_on_slot(p_slot); |
44ef4cef KK |
212 | if (retval) |
213 | return retval; | |
1da177e4 | 214 | } |
36ed27b0 | 215 | |
af9ab791 | 216 | pciehp_green_led_blink(p_slot); |
1da177e4 | 217 | |
44ef4cef | 218 | /* Check link training status */ |
82a9e79e | 219 | retval = pciehp_check_link_status(ctrl); |
44ef4cef | 220 | if (retval) { |
18b341b7 | 221 | ctrl_err(ctrl, "Failed to check link status\n"); |
5651c48c | 222 | goto err_exit; |
1da177e4 LT |
223 | } |
224 | ||
1da177e4 | 225 | /* Check for a power fault */ |
5651c48c KK |
226 | if (ctrl->power_fault_detected || pciehp_query_power_fault(p_slot)) { |
227 | ctrl_err(ctrl, "Power fault on slot %s\n", slot_name(p_slot)); | |
d9fb42a8 | 228 | retval = -EIO; |
71b720c0 | 229 | goto err_exit; |
1da177e4 LT |
230 | } |
231 | ||
44ef4cef KK |
232 | retval = pciehp_configure_device(p_slot); |
233 | if (retval) { | |
d689f7eb KK |
234 | ctrl_err(ctrl, "Cannot add device at %04x:%02x:00\n", |
235 | pci_domain_nr(parent), parent->number); | |
50277c8b YW |
236 | if (retval != -EEXIST) |
237 | goto err_exit; | |
71b720c0 | 238 | } |
1da177e4 | 239 | |
af9ab791 | 240 | pciehp_green_led_on(p_slot); |
1da177e4 | 241 | return 0; |
71b720c0 RS |
242 | |
243 | err_exit: | |
244 | set_slot_off(ctrl, p_slot); | |
44ef4cef | 245 | return retval; |
1da177e4 LT |
246 | } |
247 | ||
1da177e4 | 248 | /** |
26e6c66e RD |
249 | * remove_board - Turns off slot and LEDs |
250 | * @p_slot: slot where board is being removed | |
1da177e4 | 251 | */ |
ed6cbcf2 | 252 | static int remove_board(struct slot *p_slot) |
1da177e4 | 253 | { |
6dae6202 | 254 | int retval; |
ca22a5e4 | 255 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 | 256 | |
44ef4cef KK |
257 | retval = pciehp_unconfigure_device(p_slot); |
258 | if (retval) | |
259 | return retval; | |
1da177e4 | 260 | |
ae416e6b | 261 | if (POWER_CTRL(ctrl)) { |
6dae6202 BH |
262 | pciehp_power_off_slot(p_slot); |
263 | ||
c7b4fee3 KK |
264 | /* |
265 | * After turning power off, we must wait for at least 1 second | |
266 | * before taking any action that relies on power having been | |
267 | * removed from the slot/adapter. | |
268 | */ | |
269 | msleep(1000); | |
1da177e4 LT |
270 | } |
271 | ||
82a9e79e | 272 | /* turn off Green LED */ |
af9ab791 | 273 | pciehp_green_led_off(p_slot); |
1da177e4 LT |
274 | return 0; |
275 | } | |
276 | ||
5d386e1a KK |
277 | struct power_work_info { |
278 | struct slot *p_slot; | |
279 | struct work_struct work; | |
c4f2f5e4 RJ |
280 | unsigned int req; |
281 | #define DISABLE_REQ 0 | |
282 | #define ENABLE_REQ 1 | |
5d386e1a | 283 | }; |
1da177e4 LT |
284 | |
285 | /** | |
26e6c66e RD |
286 | * pciehp_power_thread - handle pushbutton events |
287 | * @work: &struct work_struct describing work to be done | |
1da177e4 | 288 | * |
26e6c66e | 289 | * Scheduled procedure to handle blocking stuff for the pushbuttons. |
1da177e4 | 290 | * Handles all pending events and exits. |
1da177e4 | 291 | */ |
5d386e1a | 292 | static void pciehp_power_thread(struct work_struct *work) |
1da177e4 | 293 | { |
5d386e1a KK |
294 | struct power_work_info *info = |
295 | container_of(work, struct power_work_info, work); | |
296 | struct slot *p_slot = info->p_slot; | |
50b52fde | 297 | int ret; |
5d386e1a | 298 | |
c4f2f5e4 RJ |
299 | switch (info->req) { |
300 | case DISABLE_REQ: | |
18b341b7 | 301 | ctrl_dbg(p_slot->ctrl, |
d689f7eb | 302 | "Disabling domain:bus:device=%04x:%02x:00\n", |
385e2491 KK |
303 | pci_domain_nr(p_slot->ctrl->pcie->port->subordinate), |
304 | p_slot->ctrl->pcie->port->subordinate->number); | |
50b52fde | 305 | mutex_lock(&p_slot->hotplug_lock); |
1da177e4 | 306 | pciehp_disable_slot(p_slot); |
50b52fde | 307 | mutex_unlock(&p_slot->hotplug_lock); |
5d386e1a | 308 | mutex_lock(&p_slot->lock); |
1da177e4 | 309 | p_slot->state = STATIC_STATE; |
5d386e1a | 310 | mutex_unlock(&p_slot->lock); |
c4f2f5e4 RJ |
311 | break; |
312 | case ENABLE_REQ: | |
313 | ctrl_dbg(p_slot->ctrl, | |
314 | "Enabling domain:bus:device=%04x:%02x:00\n", | |
315 | pci_domain_nr(p_slot->ctrl->pcie->port->subordinate), | |
316 | p_slot->ctrl->pcie->port->subordinate->number); | |
50b52fde RJ |
317 | mutex_lock(&p_slot->hotplug_lock); |
318 | ret = pciehp_enable_slot(p_slot); | |
319 | mutex_unlock(&p_slot->hotplug_lock); | |
320 | if (ret) | |
82a9e79e | 321 | pciehp_green_led_off(p_slot); |
5d386e1a | 322 | mutex_lock(&p_slot->lock); |
1da177e4 | 323 | p_slot->state = STATIC_STATE; |
c4f2f5e4 | 324 | mutex_unlock(&p_slot->lock); |
5d386e1a KK |
325 | break; |
326 | default: | |
327 | break; | |
1da177e4 LT |
328 | } |
329 | ||
5d386e1a | 330 | kfree(info); |
1da177e4 LT |
331 | } |
332 | ||
e325e1f0 | 333 | void pciehp_queue_pushbutton_work(struct work_struct *work) |
1da177e4 | 334 | { |
5d386e1a KK |
335 | struct slot *p_slot = container_of(work, struct slot, work.work); |
336 | struct power_work_info *info; | |
1da177e4 | 337 | |
5d386e1a KK |
338 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
339 | if (!info) { | |
7f2feec1 TI |
340 | ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n", |
341 | __func__); | |
1da177e4 LT |
342 | return; |
343 | } | |
5d386e1a KK |
344 | info->p_slot = p_slot; |
345 | INIT_WORK(&info->work, pciehp_power_thread); | |
1da177e4 | 346 | |
5d386e1a KK |
347 | mutex_lock(&p_slot->lock); |
348 | switch (p_slot->state) { | |
349 | case BLINKINGOFF_STATE: | |
1da177e4 | 350 | p_slot->state = POWEROFF_STATE; |
c4f2f5e4 | 351 | info->req = DISABLE_REQ; |
5d386e1a KK |
352 | break; |
353 | case BLINKINGON_STATE: | |
1da177e4 | 354 | p_slot->state = POWERON_STATE; |
c4f2f5e4 | 355 | info->req = ENABLE_REQ; |
5d386e1a KK |
356 | break; |
357 | default: | |
6fcaf17a | 358 | kfree(info); |
5d386e1a | 359 | goto out; |
1da177e4 | 360 | } |
c2be6f93 | 361 | queue_work(p_slot->wq, &info->work); |
5d386e1a KK |
362 | out: |
363 | mutex_unlock(&p_slot->lock); | |
1da177e4 LT |
364 | } |
365 | ||
5d386e1a KK |
366 | /* |
367 | * Note: This function must be called with slot->lock held | |
368 | */ | |
369 | static void handle_button_press_event(struct slot *p_slot) | |
1da177e4 | 370 | { |
5d386e1a | 371 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 | 372 | u8 getstatus; |
1da177e4 | 373 | |
5d386e1a KK |
374 | switch (p_slot->state) { |
375 | case STATIC_STATE: | |
82a9e79e | 376 | pciehp_get_power_status(p_slot, &getstatus); |
5d386e1a KK |
377 | if (getstatus) { |
378 | p_slot->state = BLINKINGOFF_STATE; | |
7f2feec1 TI |
379 | ctrl_info(ctrl, |
380 | "PCI slot #%s - powering off due to button " | |
e1acb24f | 381 | "press.\n", slot_name(p_slot)); |
5d386e1a KK |
382 | } else { |
383 | p_slot->state = BLINKINGON_STATE; | |
7f2feec1 TI |
384 | ctrl_info(ctrl, |
385 | "PCI slot #%s - powering on due to button " | |
e1acb24f | 386 | "press.\n", slot_name(p_slot)); |
5d386e1a KK |
387 | } |
388 | /* blink green LED and turn off amber */ | |
af9ab791 BH |
389 | pciehp_green_led_blink(p_slot); |
390 | pciehp_set_attention_status(p_slot, 0); | |
c2be6f93 | 391 | queue_delayed_work(p_slot->wq, &p_slot->work, 5*HZ); |
5d386e1a KK |
392 | break; |
393 | case BLINKINGOFF_STATE: | |
394 | case BLINKINGON_STATE: | |
395 | /* | |
396 | * Cancel if we are still blinking; this means that we | |
397 | * press the attention again before the 5 sec. limit | |
398 | * expires to cancel hot-add or hot-remove | |
399 | */ | |
e1acb24f | 400 | ctrl_info(ctrl, "Button cancel on Slot(%s)\n", slot_name(p_slot)); |
5d386e1a KK |
401 | cancel_delayed_work(&p_slot->work); |
402 | if (p_slot->state == BLINKINGOFF_STATE) { | |
af9ab791 | 403 | pciehp_green_led_on(p_slot); |
5d386e1a | 404 | } else { |
af9ab791 | 405 | pciehp_green_led_off(p_slot); |
5d386e1a | 406 | } |
af9ab791 | 407 | pciehp_set_attention_status(p_slot, 0); |
7f2feec1 | 408 | ctrl_info(ctrl, "PCI slot #%s - action canceled " |
e1acb24f | 409 | "due to button press\n", slot_name(p_slot)); |
5d386e1a KK |
410 | p_slot->state = STATIC_STATE; |
411 | break; | |
412 | case POWEROFF_STATE: | |
413 | case POWERON_STATE: | |
414 | /* | |
415 | * Ignore if the slot is on power-on or power-off state; | |
416 | * this means that the previous attention button action | |
417 | * to hot-add or hot-remove is undergoing | |
418 | */ | |
e1acb24f | 419 | ctrl_info(ctrl, "Button ignore on Slot(%s)\n", slot_name(p_slot)); |
5d386e1a KK |
420 | break; |
421 | default: | |
7f2feec1 | 422 | ctrl_warn(ctrl, "Not a valid state\n"); |
5d386e1a | 423 | break; |
1da177e4 LT |
424 | } |
425 | } | |
426 | ||
5d386e1a KK |
427 | /* |
428 | * Note: This function must be called with slot->lock held | |
429 | */ | |
430 | static void handle_surprise_event(struct slot *p_slot) | |
431 | { | |
432 | u8 getstatus; | |
433 | struct power_work_info *info; | |
434 | ||
435 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
436 | if (!info) { | |
7f2feec1 TI |
437 | ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n", |
438 | __func__); | |
5d386e1a KK |
439 | return; |
440 | } | |
441 | info->p_slot = p_slot; | |
442 | INIT_WORK(&info->work, pciehp_power_thread); | |
443 | ||
82a9e79e | 444 | pciehp_get_adapter_status(p_slot, &getstatus); |
c4f2f5e4 | 445 | if (!getstatus) { |
5d386e1a | 446 | p_slot->state = POWEROFF_STATE; |
c4f2f5e4 RJ |
447 | info->req = DISABLE_REQ; |
448 | } else { | |
5d386e1a | 449 | p_slot->state = POWERON_STATE; |
c4f2f5e4 RJ |
450 | info->req = ENABLE_REQ; |
451 | } | |
5d386e1a | 452 | |
c2be6f93 | 453 | queue_work(p_slot->wq, &info->work); |
5d386e1a KK |
454 | } |
455 | ||
e48f1b67 RJ |
456 | /* |
457 | * Note: This function must be called with slot->lock held | |
458 | */ | |
459 | static void handle_link_event(struct slot *p_slot, u32 event) | |
460 | { | |
461 | struct controller *ctrl = p_slot->ctrl; | |
462 | struct power_work_info *info; | |
463 | ||
464 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
465 | if (!info) { | |
466 | ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n", | |
467 | __func__); | |
468 | return; | |
469 | } | |
470 | info->p_slot = p_slot; | |
c4f2f5e4 | 471 | info->req = event == INT_LINK_UP ? ENABLE_REQ : DISABLE_REQ; |
e48f1b67 RJ |
472 | INIT_WORK(&info->work, pciehp_power_thread); |
473 | ||
474 | switch (p_slot->state) { | |
475 | case BLINKINGON_STATE: | |
476 | case BLINKINGOFF_STATE: | |
477 | cancel_delayed_work(&p_slot->work); | |
478 | /* Fall through */ | |
479 | case STATIC_STATE: | |
480 | p_slot->state = event == INT_LINK_UP ? | |
481 | POWERON_STATE : POWEROFF_STATE; | |
482 | queue_work(p_slot->wq, &info->work); | |
483 | break; | |
484 | case POWERON_STATE: | |
485 | if (event == INT_LINK_UP) { | |
486 | ctrl_info(ctrl, | |
487 | "Link Up event ignored on slot(%s): already powering on\n", | |
488 | slot_name(p_slot)); | |
489 | kfree(info); | |
490 | } else { | |
491 | ctrl_info(ctrl, | |
492 | "Link Down event queued on slot(%s): currently getting powered on\n", | |
493 | slot_name(p_slot)); | |
494 | p_slot->state = POWEROFF_STATE; | |
495 | queue_work(p_slot->wq, &info->work); | |
496 | } | |
497 | break; | |
498 | case POWEROFF_STATE: | |
499 | if (event == INT_LINK_UP) { | |
500 | ctrl_info(ctrl, | |
501 | "Link Up event queued on slot(%s): currently getting powered off\n", | |
502 | slot_name(p_slot)); | |
503 | p_slot->state = POWERON_STATE; | |
504 | queue_work(p_slot->wq, &info->work); | |
505 | } else { | |
506 | ctrl_info(ctrl, | |
507 | "Link Down event ignored on slot(%s): already powering off\n", | |
508 | slot_name(p_slot)); | |
509 | kfree(info); | |
510 | } | |
511 | break; | |
512 | default: | |
513 | ctrl_err(ctrl, "Not a valid state on slot(%s)\n", | |
514 | slot_name(p_slot)); | |
515 | kfree(info); | |
516 | break; | |
517 | } | |
518 | } | |
519 | ||
5d386e1a KK |
520 | static void interrupt_event_handler(struct work_struct *work) |
521 | { | |
522 | struct event_info *info = container_of(work, struct event_info, work); | |
523 | struct slot *p_slot = info->p_slot; | |
524 | struct controller *ctrl = p_slot->ctrl; | |
525 | ||
526 | mutex_lock(&p_slot->lock); | |
527 | switch (info->event_type) { | |
528 | case INT_BUTTON_PRESS: | |
529 | handle_button_press_event(p_slot); | |
530 | break; | |
531 | case INT_POWER_FAULT: | |
ae416e6b | 532 | if (!POWER_CTRL(ctrl)) |
5d386e1a | 533 | break; |
af9ab791 BH |
534 | pciehp_set_attention_status(p_slot, 1); |
535 | pciehp_green_led_off(p_slot); | |
5d386e1a KK |
536 | break; |
537 | case INT_PRESENCE_ON: | |
538 | case INT_PRESENCE_OFF: | |
ae416e6b | 539 | if (!HP_SUPR_RM(ctrl)) |
5d386e1a | 540 | break; |
7f2feec1 | 541 | ctrl_dbg(ctrl, "Surprise Removal\n"); |
5d386e1a KK |
542 | handle_surprise_event(p_slot); |
543 | break; | |
e48f1b67 RJ |
544 | case INT_LINK_UP: |
545 | case INT_LINK_DOWN: | |
546 | handle_link_event(p_slot, info->event_type); | |
547 | break; | |
5d386e1a | 548 | default: |
5d386e1a KK |
549 | break; |
550 | } | |
551 | mutex_unlock(&p_slot->lock); | |
552 | ||
553 | kfree(info); | |
554 | } | |
555 | ||
50b52fde RJ |
556 | /* |
557 | * Note: This function must be called with slot->hotplug_lock held | |
558 | */ | |
1da177e4 LT |
559 | int pciehp_enable_slot(struct slot *p_slot) |
560 | { | |
561 | u8 getstatus = 0; | |
562 | int rc; | |
7f2feec1 | 563 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 | 564 | |
6dae6202 BH |
565 | pciehp_get_adapter_status(p_slot, &getstatus); |
566 | if (!getstatus) { | |
18b341b7 | 567 | ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot)); |
c9d86d76 | 568 | return -ENODEV; |
1da177e4 | 569 | } |
ae416e6b | 570 | if (MRL_SENS(p_slot->ctrl)) { |
6dae6202 BH |
571 | pciehp_get_latch_status(p_slot, &getstatus); |
572 | if (getstatus) { | |
18b341b7 TI |
573 | ctrl_info(ctrl, "Latch open on slot(%s)\n", |
574 | slot_name(p_slot)); | |
c9d86d76 | 575 | return -ENODEV; |
1da177e4 LT |
576 | } |
577 | } | |
36ed27b0 | 578 | |
ae416e6b | 579 | if (POWER_CTRL(p_slot->ctrl)) { |
6dae6202 BH |
580 | pciehp_get_power_status(p_slot, &getstatus); |
581 | if (getstatus) { | |
18b341b7 TI |
582 | ctrl_info(ctrl, "Already enabled on slot(%s)\n", |
583 | slot_name(p_slot)); | |
c9d86d76 | 584 | return -EINVAL; |
1da177e4 LT |
585 | } |
586 | } | |
1da177e4 | 587 | |
82a9e79e | 588 | pciehp_get_latch_status(p_slot, &getstatus); |
1da177e4 | 589 | |
ca22a5e4 | 590 | rc = board_added(p_slot); |
1da177e4 | 591 | if (rc) { |
82a9e79e | 592 | pciehp_get_latch_status(p_slot, &getstatus); |
1da177e4 | 593 | } |
1da177e4 LT |
594 | return rc; |
595 | } | |
596 | ||
50b52fde RJ |
597 | /* |
598 | * Note: This function must be called with slot->hotplug_lock held | |
599 | */ | |
1da177e4 LT |
600 | int pciehp_disable_slot(struct slot *p_slot) |
601 | { | |
1da177e4 | 602 | u8 getstatus = 0; |
7f2feec1 | 603 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 LT |
604 | |
605 | if (!p_slot->ctrl) | |
606 | return 1; | |
607 | ||
ae416e6b | 608 | if (POWER_CTRL(p_slot->ctrl)) { |
6dae6202 BH |
609 | pciehp_get_power_status(p_slot, &getstatus); |
610 | if (!getstatus) { | |
18b341b7 TI |
611 | ctrl_info(ctrl, "Already disabled on slot(%s)\n", |
612 | slot_name(p_slot)); | |
c9d86d76 | 613 | return -EINVAL; |
1da177e4 LT |
614 | } |
615 | } | |
616 | ||
445f7985 | 617 | return remove_board(p_slot); |
1da177e4 LT |
618 | } |
619 | ||
5d386e1a KK |
620 | int pciehp_sysfs_enable_slot(struct slot *p_slot) |
621 | { | |
622 | int retval = -ENODEV; | |
7f2feec1 | 623 | struct controller *ctrl = p_slot->ctrl; |
5d386e1a KK |
624 | |
625 | mutex_lock(&p_slot->lock); | |
626 | switch (p_slot->state) { | |
627 | case BLINKINGON_STATE: | |
628 | cancel_delayed_work(&p_slot->work); | |
629 | case STATIC_STATE: | |
630 | p_slot->state = POWERON_STATE; | |
631 | mutex_unlock(&p_slot->lock); | |
50b52fde | 632 | mutex_lock(&p_slot->hotplug_lock); |
5d386e1a | 633 | retval = pciehp_enable_slot(p_slot); |
50b52fde | 634 | mutex_unlock(&p_slot->hotplug_lock); |
5d386e1a KK |
635 | mutex_lock(&p_slot->lock); |
636 | p_slot->state = STATIC_STATE; | |
637 | break; | |
638 | case POWERON_STATE: | |
7f2feec1 | 639 | ctrl_info(ctrl, "Slot %s is already in powering on state\n", |
e1acb24f | 640 | slot_name(p_slot)); |
5d386e1a KK |
641 | break; |
642 | case BLINKINGOFF_STATE: | |
643 | case POWEROFF_STATE: | |
e1acb24f AC |
644 | ctrl_info(ctrl, "Already enabled on slot %s\n", |
645 | slot_name(p_slot)); | |
5d386e1a KK |
646 | break; |
647 | default: | |
e1acb24f AC |
648 | ctrl_err(ctrl, "Not a valid state on slot %s\n", |
649 | slot_name(p_slot)); | |
5d386e1a KK |
650 | break; |
651 | } | |
652 | mutex_unlock(&p_slot->lock); | |
653 | ||
654 | return retval; | |
655 | } | |
656 | ||
657 | int pciehp_sysfs_disable_slot(struct slot *p_slot) | |
658 | { | |
659 | int retval = -ENODEV; | |
7f2feec1 | 660 | struct controller *ctrl = p_slot->ctrl; |
5d386e1a KK |
661 | |
662 | mutex_lock(&p_slot->lock); | |
663 | switch (p_slot->state) { | |
664 | case BLINKINGOFF_STATE: | |
665 | cancel_delayed_work(&p_slot->work); | |
666 | case STATIC_STATE: | |
667 | p_slot->state = POWEROFF_STATE; | |
668 | mutex_unlock(&p_slot->lock); | |
669 | retval = pciehp_disable_slot(p_slot); | |
670 | mutex_lock(&p_slot->lock); | |
671 | p_slot->state = STATIC_STATE; | |
672 | break; | |
673 | case POWEROFF_STATE: | |
7f2feec1 | 674 | ctrl_info(ctrl, "Slot %s is already in powering off state\n", |
e1acb24f | 675 | slot_name(p_slot)); |
5d386e1a KK |
676 | break; |
677 | case BLINKINGON_STATE: | |
678 | case POWERON_STATE: | |
e1acb24f AC |
679 | ctrl_info(ctrl, "Already disabled on slot %s\n", |
680 | slot_name(p_slot)); | |
5d386e1a KK |
681 | break; |
682 | default: | |
e1acb24f AC |
683 | ctrl_err(ctrl, "Not a valid state on slot %s\n", |
684 | slot_name(p_slot)); | |
5d386e1a KK |
685 | break; |
686 | } | |
687 | mutex_unlock(&p_slot->lock); | |
688 | ||
689 | return retval; | |
690 | } |