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[PATCH] PCI Hotplug: new contact info
[linux-block.git] / drivers / pci / hotplug / pciehp_hpc.c
CommitLineData
1da177e4
LT		 1/*
2 * PCI Express PCI Hot Plug 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
30#include <linux/config.h>
31#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/types.h>
34#include <linux/slab.h>
35#include <linux/vmalloc.h>
36#include <linux/interrupt.h>
37#include <linux/spinlock.h>
38#include <linux/pci.h>
39#include <asm/system.h>
40#include "../pci.h"
41#include "pciehp.h"
42
43#ifdef DEBUG
44#define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
45#define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
46#define DBG_K_INFO ((unsigned int)0x00000004) /* Info messages */
47#define DBG_K_ERROR ((unsigned int)0x00000008) /* Error messages */
48#define DBG_K_TRACE (DBG_K_TRACE_ENTRY|DBG_K_TRACE_EXIT)
49#define DBG_K_STANDARD (DBG_K_INFO|DBG_K_ERROR|DBG_K_TRACE)
50/* Redefine this flagword to set debug level */
51#define DEBUG_LEVEL DBG_K_STANDARD
52
53#define DEFINE_DBG_BUFFER char __dbg_str_buf[256];
54
55#define DBG_PRINT( dbg_flags, args... ) \
56 do { \
57 if ( DEBUG_LEVEL & ( dbg_flags ) ) \
58 { \
59 int len; \
60 len = sprintf( __dbg_str_buf, "%s:%d: %s: ", \
61 __FILE__, __LINE__, __FUNCTION__ ); \
62 sprintf( __dbg_str_buf + len, args ); \
63 printk( KERN_NOTICE "%s\n", __dbg_str_buf ); \
64 } \
65 } while (0)
66
67#define DBG_ENTER_ROUTINE DBG_PRINT (DBG_K_TRACE_ENTRY, "%s", "[Entry]");
68#define DBG_LEAVE_ROUTINE DBG_PRINT (DBG_K_TRACE_EXIT, "%s", "[Exit]");
69#else
70#define DEFINE_DBG_BUFFER
71#define DBG_ENTER_ROUTINE
72#define DBG_LEAVE_ROUTINE
73#endif /* DEBUG */
74
75struct ctrl_reg {
76 u8 cap_id;
77 u8 nxt_ptr;
78 u16 cap_reg;
79 u32 dev_cap;
80 u16 dev_ctrl;
81 u16 dev_status;
82 u32 lnk_cap;
83 u16 lnk_ctrl;
84 u16 lnk_status;
85 u32 slot_cap;
86 u16 slot_ctrl;
87 u16 slot_status;
88 u16 root_ctrl;
89 u16 rsvp;
90 u32 root_status;
91} __attribute__ ((packed));
92
93/* offsets to the controller registers based on the above structure layout */
94enum ctrl_offsets {
95 PCIECAPID = offsetof(struct ctrl_reg, cap_id),
96 NXTCAPPTR = offsetof(struct ctrl_reg, nxt_ptr),
97 CAPREG = offsetof(struct ctrl_reg, cap_reg),
98 DEVCAP = offsetof(struct ctrl_reg, dev_cap),
99 DEVCTRL = offsetof(struct ctrl_reg, dev_ctrl),
100 DEVSTATUS = offsetof(struct ctrl_reg, dev_status),
101 LNKCAP = offsetof(struct ctrl_reg, lnk_cap),
102 LNKCTRL = offsetof(struct ctrl_reg, lnk_ctrl),
103 LNKSTATUS = offsetof(struct ctrl_reg, lnk_status),
104 SLOTCAP = offsetof(struct ctrl_reg, slot_cap),
105 SLOTCTRL = offsetof(struct ctrl_reg, slot_ctrl),
106 SLOTSTATUS = offsetof(struct ctrl_reg, slot_status),
107 ROOTCTRL = offsetof(struct ctrl_reg, root_ctrl),
108 ROOTSTATUS = offsetof(struct ctrl_reg, root_status),
109};
110static int pcie_cap_base = 0; /* Base of the PCI Express capability item structure */
111
8b245e45
DS		 112#define PCIE_CAP_ID(cb) ( cb + PCIECAPID )
113#define NXT_CAP_PTR(cb) ( cb + NXTCAPPTR )
114#define CAP_REG(cb) ( cb + CAPREG )
115#define DEV_CAP(cb) ( cb + DEVCAP )
116#define DEV_CTRL(cb) ( cb + DEVCTRL )
117#define DEV_STATUS(cb) ( cb + DEVSTATUS )
118#define LNK_CAP(cb) ( cb + LNKCAP )
119#define LNK_CTRL(cb) ( cb + LNKCTRL )
120#define LNK_STATUS(cb) ( cb + LNKSTATUS )
121#define SLOT_CAP(cb) ( cb + SLOTCAP )
122#define SLOT_CTRL(cb) ( cb + SLOTCTRL )
123#define SLOT_STATUS(cb) ( cb + SLOTSTATUS )
124#define ROOT_CTRL(cb) ( cb + ROOTCTRL )
125#define ROOT_STATUS(cb) ( cb + ROOTSTATUS )
1da177e4
LT		 126
127#define hp_register_read_word(pdev, reg , value) \
128 pci_read_config_word(pdev, reg, &value)
129
130#define hp_register_read_dword(pdev, reg , value) \
131 pci_read_config_dword(pdev, reg, &value)
132
133#define hp_register_write_word(pdev, reg , value) \
134 pci_write_config_word(pdev, reg, value)
135
136#define hp_register_dwrite_word(pdev, reg , value) \
137 pci_write_config_dword(pdev, reg, value)
138
139/* Field definitions in PCI Express Capabilities Register */
140#define CAP_VER 0x000F
141#define DEV_PORT_TYPE 0x00F0
142#define SLOT_IMPL 0x0100
143#define MSG_NUM 0x3E00
144
145/* Device or Port Type */
146#define NAT_ENDPT 0x00
147#define LEG_ENDPT 0x01
148#define ROOT_PORT 0x04
149#define UP_STREAM 0x05
150#define DN_STREAM 0x06
151#define PCIE_PCI_BRDG 0x07
152#define PCI_PCIE_BRDG 0x10
153
154/* Field definitions in Device Capabilities Register */
155#define DATTN_BUTTN_PRSN 0x1000
156#define DATTN_LED_PRSN 0x2000
157#define DPWR_LED_PRSN 0x4000
158
159/* Field definitions in Link Capabilities Register */
160#define MAX_LNK_SPEED 0x000F
161#define MAX_LNK_WIDTH 0x03F0
162
163/* Link Width Encoding */
164#define LNK_X1 0x01
165#define LNK_X2 0x02
166#define LNK_X4 0x04
167#define LNK_X8 0x08
168#define LNK_X12 0x0C
169#define LNK_X16 0x10
170#define LNK_X32 0x20
171
172/*Field definitions of Link Status Register */
173#define LNK_SPEED 0x000F
174#define NEG_LINK_WD 0x03F0
175#define LNK_TRN_ERR 0x0400
176#define LNK_TRN 0x0800
177#define SLOT_CLK_CONF 0x1000
178
179/* Field definitions in Slot Capabilities Register */
180#define ATTN_BUTTN_PRSN 0x00000001
181#define PWR_CTRL_PRSN 0x00000002
182#define MRL_SENS_PRSN 0x00000004
183#define ATTN_LED_PRSN 0x00000008
184#define PWR_LED_PRSN 0x00000010
185#define HP_SUPR_RM_SUP 0x00000020
186#define HP_CAP 0x00000040
187#define SLOT_PWR_VALUE 0x000003F8
188#define SLOT_PWR_LIMIT 0x00000C00
189#define PSN 0xFFF80000 /* PSN: Physical Slot Number */
190
191/* Field definitions in Slot Control Register */
192#define ATTN_BUTTN_ENABLE 0x0001
193#define PWR_FAULT_DETECT_ENABLE 0x0002
194#define MRL_DETECT_ENABLE 0x0004
195#define PRSN_DETECT_ENABLE 0x0008
196#define CMD_CMPL_INTR_ENABLE 0x0010
197#define HP_INTR_ENABLE 0x0020
198#define ATTN_LED_CTRL 0x00C0
199#define PWR_LED_CTRL 0x0300
200#define PWR_CTRL 0x0400
201
202/* Attention indicator and Power indicator states */
203#define LED_ON 0x01
204#define LED_BLINK 0x10
205#define LED_OFF 0x11
206
207/* Power Control Command */
208#define POWER_ON 0
209#define POWER_OFF 0x0400
210
211/* Field definitions in Slot Status Register */
212#define ATTN_BUTTN_PRESSED 0x0001
213#define PWR_FAULT_DETECTED 0x0002
214#define MRL_SENS_CHANGED 0x0004
215#define PRSN_DETECT_CHANGED 0x0008
216#define CMD_COMPLETED 0x0010
217#define MRL_STATE 0x0020
218#define PRSN_STATE 0x0040
219
220struct php_ctlr_state_s {
221 struct php_ctlr_state_s *pnext;
222 struct pci_dev *pci_dev;
223 unsigned int irq;
224 unsigned long flags; /* spinlock's */
225 u32 slot_device_offset;
226 u32 num_slots;
227 struct timer_list int_poll_timer; /* Added for poll event */
228 php_intr_callback_t attention_button_callback;
229 php_intr_callback_t switch_change_callback;
230 php_intr_callback_t presence_change_callback;
231 php_intr_callback_t power_fault_callback;
232 void *callback_instance_id;
233 struct ctrl_reg *creg; /* Ptr to controller register space */
234};
235
236
237static spinlock_t hpc_event_lock;
238
239DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
240static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
241static int ctlr_seq_num = 0; /* Controller sequence # */
242static spinlock_t list_lock;
243
244static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs);
245
246static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
247
248/* This is the interrupt polling timeout function. */
249static void int_poll_timeout(unsigned long lphp_ctlr)
250{
251 struct php_ctlr_state_s *php_ctlr = (struct php_ctlr_state_s *)lphp_ctlr;
252
253 DBG_ENTER_ROUTINE
254
255 if ( !php_ctlr ) {
256 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
257 return;
258 }
259
260 /* Poll for interrupt events. regs == NULL => polling */
261 pcie_isr( 0, (void *)php_ctlr, NULL );
262
263 init_timer(&php_ctlr->int_poll_timer);
264
265 if (!pciehp_poll_time)
266 pciehp_poll_time = 2; /* reset timer to poll in 2 secs if user doesn't specify at module installation*/
267
268 start_int_poll_timer(php_ctlr, pciehp_poll_time);
269
270 return;
271}
272
273/* This function starts the interrupt polling timer. */
274static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds)
275{
276 if (!php_ctlr) {
277 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
278 return;
279 }
280
281 if ( ( seconds <= 0 ) || ( seconds > 60 ) )
282 seconds = 2; /* Clamp to sane value */
283
284 php_ctlr->int_poll_timer.function = &int_poll_timeout;
285 php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr; /* Instance data */
286 php_ctlr->int_poll_timer.expires = jiffies + seconds * HZ;
287 add_timer(&php_ctlr->int_poll_timer);
288
289 return;
290}
291
292static int pcie_write_cmd(struct slot *slot, u16 cmd)
293{
294 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
295 int retval = 0;
296 u16 slot_status;
297
298 DBG_ENTER_ROUTINE
299
300 dbg("%s : Enter\n", __FUNCTION__);
301 if (!php_ctlr) {
302 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
303 return -1;
304 }
305
8b245e45 306 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
1da177e4
LT		 307 if (retval) {
308 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
309 return retval;
310 }
311 dbg("%s : hp_register_read_word SLOT_STATUS %x\n", __FUNCTION__, slot_status);
312
313 if ((slot_status & CMD_COMPLETED) == CMD_COMPLETED ) {
314 /* After 1 sec and CMD_COMPLETED still not set, just proceed forward to issue
315 the next command according to spec. Just print out the error message */
316 dbg("%s : CMD_COMPLETED not clear after 1 sec.\n", __FUNCTION__);
317 }
318
319 dbg("%s: Before hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd);
8b245e45 320 retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), cmd | CMD_CMPL_INTR_ENABLE);
1da177e4
LT		 321 if (retval) {
322 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
323 return retval;
324 }
325 dbg("%s : hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd | CMD_CMPL_INTR_ENABLE);
326 dbg("%s : Exit\n", __FUNCTION__);
327
328 DBG_LEAVE_ROUTINE
329 return retval;
330}
331
332static int hpc_check_lnk_status(struct controller *ctrl)
333{
334 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
335 u16 lnk_status;
336 int retval = 0;
337
338 DBG_ENTER_ROUTINE
339
340 if (!php_ctlr) {
341 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
342 return -1;
343 }
344
8b245e45 345 retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(ctrl->cap_base), lnk_status);
1da177e4
LT		 346
347 if (retval) {
348 err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
349 return retval;
350 }
351
352 dbg("%s: lnk_status = %x\n", __FUNCTION__, lnk_status);
353 if ( (lnk_status & LNK_TRN) || (lnk_status & LNK_TRN_ERR) ||
354 !(lnk_status & NEG_LINK_WD)) {
355 err("%s : Link Training Error occurs \n", __FUNCTION__);
356 retval = -1;
357 return retval;
358 }
359
360 DBG_LEAVE_ROUTINE
361 return retval;
362}
363
364
365static int hpc_get_attention_status(struct slot *slot, u8 *status)
366{
367 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
368 u16 slot_ctrl;
369 u8 atten_led_state;
370 int retval = 0;
371
372 DBG_ENTER_ROUTINE
373
374 if (!php_ctlr) {
375 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
376 return -1;
377 }
378
8b245e45 379 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 380
381 if (retval) {
382 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
383 return retval;
384 }
385
8b245e45 386 dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__,SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 387
388 atten_led_state = (slot_ctrl & ATTN_LED_CTRL) >> 6;
389
390 switch (atten_led_state) {
391 case 0:
392 *status = 0xFF; /* Reserved */
393 break;
394 case 1:
395 *status = 1; /* On */
396 break;
397 case 2:
398 *status = 2; /* Blink */
399 break;
400 case 3:
401 *status = 0; /* Off */
402 break;
403 default:
404 *status = 0xFF;
405 break;
406 }
407
408 DBG_LEAVE_ROUTINE
409 return 0;
410}
411
412static int hpc_get_power_status(struct slot * slot, u8 *status)
413{
414 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
415 u16 slot_ctrl;
416 u8 pwr_state;
417 int retval = 0;
418
419 DBG_ENTER_ROUTINE
420
421 if (!php_ctlr) {
422 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
423 return -1;
424 }
425
8b245e45 426 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 427
428 if (retval) {
429 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
430 return retval;
431 }
8b245e45 432 dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 433
434 pwr_state = (slot_ctrl & PWR_CTRL) >> 10;
435
436 switch (pwr_state) {
437 case 0:
438 *status = 1;
439 break;
440 case 1:
441 *status = 0;
442 break;
443 default:
444 *status = 0xFF;
445 break;
446 }
447
448 DBG_LEAVE_ROUTINE
449 return retval;
450}
451
452
453static int hpc_get_latch_status(struct slot *slot, u8 *status)
454{
455 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
456 u16 slot_status;
457 int retval = 0;
458
459 DBG_ENTER_ROUTINE
460
461 if (!php_ctlr) {
462 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
463 return -1;
464 }
465
8b245e45 466 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
1da177e4
LT		 467
468 if (retval) {
469 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
470 return retval;
471 }
472
473 *status = (((slot_status & MRL_STATE) >> 5) == 0) ? 0 : 1;
474
475 DBG_LEAVE_ROUTINE
476 return 0;
477}
478
479static int hpc_get_adapter_status(struct slot *slot, u8 *status)
480{
481 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
482 u16 slot_status;
483 u8 card_state;
484 int retval = 0;
485
486 DBG_ENTER_ROUTINE
487
488 if (!php_ctlr) {
489 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
490 return -1;
491 }
492
8b245e45 493 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
1da177e4
LT		 494
495 if (retval) {
496 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
497 return retval;
498 }
499 card_state = (u8)((slot_status & PRSN_STATE) >> 6);
500 *status = (card_state == 1) ? 1 : 0;
501
502 DBG_LEAVE_ROUTINE
503 return 0;
504}
505
506static int hpc_query_power_fault(struct slot * slot)
507{
508 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
509 u16 slot_status;
510 u8 pwr_fault;
511 int retval = 0;
512 u8 status;
513
514 DBG_ENTER_ROUTINE
515
516 if (!php_ctlr) {
517 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
518 return -1;
519 }
520
8b245e45 521 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
1da177e4
LT		 522
523 if (retval) {
524 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
525 return retval;
526 }
527 pwr_fault = (u8)((slot_status & PWR_FAULT_DETECTED) >> 1);
528 status = (pwr_fault != 1) ? 1 : 0;
529
530 DBG_LEAVE_ROUTINE
531 /* Note: Logic 0 => fault */
532 return status;
533}
534
535static int hpc_set_attention_status(struct slot *slot, u8 value)
536{
537 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
538 u16 slot_cmd = 0;
539 u16 slot_ctrl;
540 int rc = 0;
541
542 dbg("%s: \n", __FUNCTION__);
543 if (!php_ctlr) {
544 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
545 return -1;
546 }
547
548 if (slot->hp_slot >= php_ctlr->num_slots) {
549 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
550 return -1;
551 }
8b245e45 552 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 553
554 if (rc) {
555 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
556 return rc;
557 }
558 dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
559
560 switch (value) {
561 case 0 : /* turn off */
562 slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x00C0;
563 break;
564 case 1: /* turn on */
565 slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x0040;
566 break;
567 case 2: /* turn blink */
568 slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x0080;
569 break;
570 default:
571 return -1;
572 }
573 if (!pciehp_poll_mode)
574 slot_cmd = slot_cmd | HP_INTR_ENABLE;
575
576 pcie_write_cmd(slot, slot_cmd);
8b245e45 577 dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
1da177e4
LT		 578
579 return rc;
580}
581
582
583static void hpc_set_green_led_on(struct slot *slot)
584{
585 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
586 u16 slot_cmd;
587 u16 slot_ctrl;
588 int rc = 0;
589
590 dbg("%s: \n", __FUNCTION__);
591 if (!php_ctlr) {
592 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
593 return ;
594 }
595
596 if (slot->hp_slot >= php_ctlr->num_slots) {
597 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
598 return ;
599 }
600
8b245e45 601 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 602
603 if (rc) {
604 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
605 return;
606 }
607 dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
608 slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0100;
609 if (!pciehp_poll_mode)
610 slot_cmd = slot_cmd | HP_INTR_ENABLE;
611
612 pcie_write_cmd(slot, slot_cmd);
613
8b245e45 614 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
1da177e4
LT		 615 return;
616}
617
618static void hpc_set_green_led_off(struct slot *slot)
619{
620 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
621 u16 slot_cmd;
622 u16 slot_ctrl;
623 int rc = 0;
624
625 dbg("%s: \n", __FUNCTION__);
626 if (!php_ctlr) {
627 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
628 return ;
629 }
630
631 if (slot->hp_slot >= php_ctlr->num_slots) {
632 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
633 return ;
634 }
635
8b245e45 636 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 637
638 if (rc) {
639 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
640 return;
641 }
642 dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
643
644 slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0300;
645
646 if (!pciehp_poll_mode)
647 slot_cmd = slot_cmd | HP_INTR_ENABLE;
648 pcie_write_cmd(slot, slot_cmd);
8b245e45 649 dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
1da177e4
LT		 650
651 return;
652}
653
654static void hpc_set_green_led_blink(struct slot *slot)
655{
656 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
657 u16 slot_cmd;
658 u16 slot_ctrl;
659 int rc = 0;
660
661 dbg("%s: \n", __FUNCTION__);
662 if (!php_ctlr) {
663 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
664 return ;
665 }
666
667 if (slot->hp_slot >= php_ctlr->num_slots) {
668 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
669 return ;
670 }
671
8b245e45 672 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 673
674 if (rc) {
675 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
676 return;
677 }
678 dbg("%s : hp_register_read_word SLOT_CTRL %x\n", __FUNCTION__, slot_ctrl);
679
680 slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0200;
681
682 if (!pciehp_poll_mode)
683 slot_cmd = slot_cmd | HP_INTR_ENABLE;
684 pcie_write_cmd(slot, slot_cmd);
685
8b245e45 686 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
1da177e4
LT		 687 return;
688}
689
690int pcie_get_ctlr_slot_config(struct controller *ctrl,
691 int *num_ctlr_slots, /* number of slots in this HPC; only 1 in PCIE */
692 int *first_device_num, /* PCI dev num of the first slot in this PCIE */
693 int *physical_slot_num, /* phy slot num of the first slot in this PCIE */
694 u8 *ctrlcap)
695{
696 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
697 u32 slot_cap;
698 int rc = 0;
699
700 DBG_ENTER_ROUTINE
701
702 if (!php_ctlr) {
703 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
704 return -1;
705 }
706
707 *first_device_num = 0;
708 *num_ctlr_slots = 1;
709
8b245e45 710 rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
1da177e4
LT		 711
712 if (rc) {
713 err("%s : hp_register_read_dword SLOT_CAP failed\n", __FUNCTION__);
714 return -1;
715 }
716
717 *physical_slot_num = slot_cap >> 19;
718 dbg("%s: PSN %d \n", __FUNCTION__, *physical_slot_num);
719
720 *ctrlcap = slot_cap & 0x0000007f;
721
722 DBG_LEAVE_ROUTINE
723 return 0;
724}
725
726static void hpc_release_ctlr(struct controller *ctrl)
727{
728 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
729 struct php_ctlr_state_s *p, *p_prev;
730
731 DBG_ENTER_ROUTINE
732
733 if (!php_ctlr) {
734 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
735 return ;
736 }
737
738 if (pciehp_poll_mode) {
739 del_timer(&php_ctlr->int_poll_timer);
740 } else {
741 if (php_ctlr->irq) {
742 free_irq(php_ctlr->irq, ctrl);
743 php_ctlr->irq = 0;
744 if (!pcie_mch_quirk)
745 pci_disable_msi(php_ctlr->pci_dev);
746 }
747 }
748 if (php_ctlr->pci_dev)
749 php_ctlr->pci_dev = NULL;
750
751 spin_lock(&list_lock);
752 p = php_ctlr_list_head;
753 p_prev = NULL;
754 while (p) {
755 if (p == php_ctlr) {
756 if (p_prev)
757 p_prev->pnext = p->pnext;
758 else
759 php_ctlr_list_head = p->pnext;
760 break;
761 } else {
762 p_prev = p;
763 p = p->pnext;
764 }
765 }
766 spin_unlock(&list_lock);
767
768 kfree(php_ctlr);
769
770 DBG_LEAVE_ROUTINE
771
772}
773
774static int hpc_power_on_slot(struct slot * slot)
775{
776 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
777 u16 slot_cmd;
778 u16 slot_ctrl;
779
780 int retval = 0;
781
782 DBG_ENTER_ROUTINE
783 dbg("%s: \n", __FUNCTION__);
784
785 if (!php_ctlr) {
786 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
787 return -1;
788 }
789
790 dbg("%s: slot->hp_slot %x\n", __FUNCTION__, slot->hp_slot);
791 if (slot->hp_slot >= php_ctlr->num_slots) {
792 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
793 return -1;
794 }
795
8b245e45 796 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 797
798 if (retval) {
799 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
800 return retval;
801 }
8b245e45 802 dbg("%s: SLOT_CTRL %x, value read %xn", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base),
1da177e4
LT		 803 slot_ctrl);
804
805 slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_ON;
806
807 if (!pciehp_poll_mode)
808 slot_cmd = slot_cmd | HP_INTR_ENABLE;
809
810 retval = pcie_write_cmd(slot, slot_cmd);
811
812 if (retval) {
813 err("%s: Write %x command failed!\n", __FUNCTION__, slot_cmd);
814 return -1;
815 }
8b245e45 816 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
1da177e4
LT		 817
818 DBG_LEAVE_ROUTINE
819
820 return retval;
821}
822
823static int hpc_power_off_slot(struct slot * slot)
824{
825 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
826 u16 slot_cmd;
827 u16 slot_ctrl;
828
829 int retval = 0;
830
831 DBG_ENTER_ROUTINE
832 dbg("%s: \n", __FUNCTION__);
833
834 if (!php_ctlr) {
835 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
836 return -1;
837 }
838
839 dbg("%s: slot->hp_slot %x\n", __FUNCTION__, slot->hp_slot);
840 slot->hp_slot = 0;
841 if (slot->hp_slot >= php_ctlr->num_slots) {
842 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
843 return -1;
844 }
8b245e45 845 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
1da177e4
LT		 846
847 if (retval) {
848 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
849 return retval;
850 }
8b245e45 851 dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base),
1da177e4
LT		 852 slot_ctrl);
853
854 slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_OFF;
855
856 if (!pciehp_poll_mode)
857 slot_cmd = slot_cmd | HP_INTR_ENABLE;
858
859 retval = pcie_write_cmd(slot, slot_cmd);
860
861 if (retval) {
862 err("%s: Write command failed!\n", __FUNCTION__);
863 return -1;
864 }
8b245e45 865 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
1da177e4
LT		 866
867 DBG_LEAVE_ROUTINE
868
869 return retval;
870}
871
872static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
873{
874 struct controller *ctrl = NULL;
875 struct php_ctlr_state_s *php_ctlr;
876 u8 schedule_flag = 0;
877 u16 slot_status, intr_detect, intr_loc;
878 u16 temp_word;
879 int hp_slot = 0; /* only 1 slot per PCI Express port */
880 int rc = 0;
881
882 if (!dev_id)
883 return IRQ_NONE;
884
885 if (!pciehp_poll_mode) {
886 ctrl = dev_id;
887 php_ctlr = ctrl->hpc_ctlr_handle;
888 } else {
889 php_ctlr = dev_id;
890 ctrl = (struct controller *)php_ctlr->callback_instance_id;
891 }
892
893 if (!ctrl) {
894 dbg("%s: dev_id %p ctlr == NULL\n", __FUNCTION__, (void*) dev_id);
895 return IRQ_NONE;
896 }
897
898 if (!php_ctlr) {
899 dbg("%s: php_ctlr == NULL\n", __FUNCTION__);
900 return IRQ_NONE;
901 }
902
8b245e45 903 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 904 if (rc) {
905 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
906 return IRQ_NONE;
907 }
908
909 intr_detect = ( ATTN_BUTTN_PRESSED | PWR_FAULT_DETECTED | MRL_SENS_CHANGED |
910 PRSN_DETECT_CHANGED | CMD_COMPLETED );
911
912 intr_loc = slot_status & intr_detect;
913
914 /* Check to see if it was our interrupt */
915 if ( !intr_loc )
916 return IRQ_NONE;
917
918 dbg("%s: intr_loc %x\n", __FUNCTION__, intr_loc);
919 /* Mask Hot-plug Interrupt Enable */
920 if (!pciehp_poll_mode) {
8b245e45 921 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 922 if (rc) {
923 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
924 return IRQ_NONE;
925 }
926
927 dbg("%s: Set Mask Hot-plug Interrupt Enable\n", __FUNCTION__);
928 dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
929 temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
930
8b245e45 931 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 932 if (rc) {
933 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
934 return IRQ_NONE;
935 }
936 dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
937
8b245e45 938 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 939 if (rc) {
940 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
941 return IRQ_NONE;
942 }
943 dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
944
945 /* Clear command complete interrupt caused by this write */
946 temp_word = 0x1f;
8b245e45 947 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 948 if (rc) {
949 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
950 return IRQ_NONE;
951 }
952 dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
953 }
954
955 if (intr_loc & CMD_COMPLETED) {
956 /*
957 * Command Complete Interrupt Pending
958 */
959 dbg("%s: In Command Complete Interrupt Pending\n", __FUNCTION__);
960 wake_up_interruptible(&ctrl->queue);
961 }
962
963 if ((php_ctlr->switch_change_callback) && (intr_loc & MRL_SENS_CHANGED))
964 schedule_flag += php_ctlr->switch_change_callback(
965 hp_slot, php_ctlr->callback_instance_id);
966 if ((php_ctlr->attention_button_callback) && (intr_loc & ATTN_BUTTN_PRESSED))
967 schedule_flag += php_ctlr->attention_button_callback(
968 hp_slot, php_ctlr->callback_instance_id);
969 if ((php_ctlr->presence_change_callback) && (intr_loc & PRSN_DETECT_CHANGED))
970 schedule_flag += php_ctlr->presence_change_callback(
971 hp_slot , php_ctlr->callback_instance_id);
972 if ((php_ctlr->power_fault_callback) && (intr_loc & PWR_FAULT_DETECTED))
973 schedule_flag += php_ctlr->power_fault_callback(
974 hp_slot, php_ctlr->callback_instance_id);
975
976 /* Clear all events after serving them */
977 temp_word = 0x1F;
8b245e45 978 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 979 if (rc) {
980 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
981 return IRQ_NONE;
982 }
983 /* Unmask Hot-plug Interrupt Enable */
984 if (!pciehp_poll_mode) {
8b245e45 985 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 986 if (rc) {
987 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
988 return IRQ_NONE;
989 }
990
991 dbg("%s: Unmask Hot-plug Interrupt Enable\n", __FUNCTION__);
992 dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
993 temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
994
8b245e45 995 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 996 if (rc) {
997 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
998 return IRQ_NONE;
999 }
1000 dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
1001
8b245e45 1002 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 1003 if (rc) {
1004 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1005 return IRQ_NONE;
1006 }
1007 dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
1008
1009 /* Clear command complete interrupt caused by this write */
1010 temp_word = 0x1F;
8b245e45 1011 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 1012 if (rc) {
1013 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
1014 return IRQ_NONE;
1015 }
1016 dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
1017 }
1018
1019 return IRQ_HANDLED;
1020}
1021
1022static int hpc_get_max_lnk_speed (struct slot *slot, enum pci_bus_speed *value)
1023{
1024 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1025 enum pcie_link_speed lnk_speed;
1026 u32 lnk_cap;
1027 int retval = 0;
1028
1029 DBG_ENTER_ROUTINE
1030
1031 if (!php_ctlr) {
1032 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1033 return -1;
1034 }
1035
1036 if (slot->hp_slot >= php_ctlr->num_slots) {
1037 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1038 return -1;
1039 }
1040
8b245e45 1041 retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
1da177e4
LT		 1042
1043 if (retval) {
1044 err("%s : hp_register_read_dword LNK_CAP failed\n", __FUNCTION__);
1045 return retval;
1046 }
1047
1048 switch (lnk_cap & 0x000F) {
1049 case 1:
1050 lnk_speed = PCIE_2PT5GB;
1051 break;
1052 default:
1053 lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
1054 break;
1055 }
1056
1057 *value = lnk_speed;
1058 dbg("Max link speed = %d\n", lnk_speed);
1059 DBG_LEAVE_ROUTINE
1060 return retval;
1061}
1062
1063static int hpc_get_max_lnk_width (struct slot *slot, enum pcie_link_width *value)
1064{
1065 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1066 enum pcie_link_width lnk_wdth;
1067 u32 lnk_cap;
1068 int retval = 0;
1069
1070 DBG_ENTER_ROUTINE
1071
1072 if (!php_ctlr) {
1073 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1074 return -1;
1075 }
1076
1077 if (slot->hp_slot >= php_ctlr->num_slots) {
1078 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1079 return -1;
1080 }
1081
8b245e45 1082 retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
1da177e4
LT		 1083
1084 if (retval) {
1085 err("%s : hp_register_read_dword LNK_CAP failed\n", __FUNCTION__);
1086 return retval;
1087 }
1088
1089 switch ((lnk_cap & 0x03F0) >> 4){
1090 case 0:
1091 lnk_wdth = PCIE_LNK_WIDTH_RESRV;
1092 break;
1093 case 1:
1094 lnk_wdth = PCIE_LNK_X1;
1095 break;
1096 case 2:
1097 lnk_wdth = PCIE_LNK_X2;
1098 break;
1099 case 4:
1100 lnk_wdth = PCIE_LNK_X4;
1101 break;
1102 case 8:
1103 lnk_wdth = PCIE_LNK_X8;
1104 break;
1105 case 12:
1106 lnk_wdth = PCIE_LNK_X12;
1107 break;
1108 case 16:
1109 lnk_wdth = PCIE_LNK_X16;
1110 break;
1111 case 32:
1112 lnk_wdth = PCIE_LNK_X32;
1113 break;
1114 default:
1115 lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
1116 break;
1117 }
1118
1119 *value = lnk_wdth;
1120 dbg("Max link width = %d\n", lnk_wdth);
1121 DBG_LEAVE_ROUTINE
1122 return retval;
1123}
1124
1125static int hpc_get_cur_lnk_speed (struct slot *slot, enum pci_bus_speed *value)
1126{
1127 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1128 enum pcie_link_speed lnk_speed = PCI_SPEED_UNKNOWN;
1129 int retval = 0;
1130 u16 lnk_status;
1131
1132 DBG_ENTER_ROUTINE
1133
1134 if (!php_ctlr) {
1135 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1136 return -1;
1137 }
1138
1139 if (slot->hp_slot >= php_ctlr->num_slots) {
1140 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1141 return -1;
1142 }
1143
8b245e45 1144 retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
1da177e4
LT		 1145
1146 if (retval) {
1147 err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
1148 return retval;
1149 }
1150
1151 switch (lnk_status & 0x0F) {
1152 case 1:
1153 lnk_speed = PCIE_2PT5GB;
1154 break;
1155 default:
1156 lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
1157 break;
1158 }
1159
1160 *value = lnk_speed;
1161 dbg("Current link speed = %d\n", lnk_speed);
1162 DBG_LEAVE_ROUTINE
1163 return retval;
1164}
1165
1166static int hpc_get_cur_lnk_width (struct slot *slot, enum pcie_link_width *value)
1167{
1168 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1169 enum pcie_link_width lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
1170 int retval = 0;
1171 u16 lnk_status;
1172
1173 DBG_ENTER_ROUTINE
1174
1175 if (!php_ctlr) {
1176 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1177 return -1;
1178 }
1179
1180 if (slot->hp_slot >= php_ctlr->num_slots) {
1181 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1182 return -1;
1183 }
1184
8b245e45 1185 retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
1da177e4
LT		 1186
1187 if (retval) {
1188 err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
1189 return retval;
1190 }
1191
1192 switch ((lnk_status & 0x03F0) >> 4){
1193 case 0:
1194 lnk_wdth = PCIE_LNK_WIDTH_RESRV;
1195 break;
1196 case 1:
1197 lnk_wdth = PCIE_LNK_X1;
1198 break;
1199 case 2:
1200 lnk_wdth = PCIE_LNK_X2;
1201 break;
1202 case 4:
1203 lnk_wdth = PCIE_LNK_X4;
1204 break;
1205 case 8:
1206 lnk_wdth = PCIE_LNK_X8;
1207 break;
1208 case 12:
1209 lnk_wdth = PCIE_LNK_X12;
1210 break;
1211 case 16:
1212 lnk_wdth = PCIE_LNK_X16;
1213 break;
1214 case 32:
1215 lnk_wdth = PCIE_LNK_X32;
1216 break;
1217 default:
1218 lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
1219 break;
1220 }
1221
1222 *value = lnk_wdth;
1223 dbg("Current link width = %d\n", lnk_wdth);
1224 DBG_LEAVE_ROUTINE
1225 return retval;
1226}
1227
1228static struct hpc_ops pciehp_hpc_ops = {
1229 .power_on_slot = hpc_power_on_slot,
1230 .power_off_slot = hpc_power_off_slot,
1231 .set_attention_status = hpc_set_attention_status,
1232 .get_power_status = hpc_get_power_status,
1233 .get_attention_status = hpc_get_attention_status,
1234 .get_latch_status = hpc_get_latch_status,
1235 .get_adapter_status = hpc_get_adapter_status,
1236
1237 .get_max_bus_speed = hpc_get_max_lnk_speed,
1238 .get_cur_bus_speed = hpc_get_cur_lnk_speed,
1239 .get_max_lnk_width = hpc_get_max_lnk_width,
1240 .get_cur_lnk_width = hpc_get_cur_lnk_width,
1241
1242 .query_power_fault = hpc_query_power_fault,
1243 .green_led_on = hpc_set_green_led_on,
1244 .green_led_off = hpc_set_green_led_off,
1245 .green_led_blink = hpc_set_green_led_blink,
1246
1247 .release_ctlr = hpc_release_ctlr,
1248 .check_lnk_status = hpc_check_lnk_status,
1249};
1250
1251int pcie_init(struct controller * ctrl,
1252 struct pcie_device *dev,
1253 php_intr_callback_t attention_button_callback,
1254 php_intr_callback_t switch_change_callback,
1255 php_intr_callback_t presence_change_callback,
1256 php_intr_callback_t power_fault_callback)
1257{
1258 struct php_ctlr_state_s *php_ctlr, *p;
1259 void *instance_id = ctrl;
1260 int rc;
1261 static int first = 1;
1262 u16 temp_word;
1263 u16 cap_reg;
1264 u16 intr_enable = 0;
1265 u32 slot_cap;
1266 int cap_base, saved_cap_base;
1267 u16 slot_status, slot_ctrl;
1268 struct pci_dev *pdev;
1269
1270 DBG_ENTER_ROUTINE
1271
1272 spin_lock_init(&list_lock);
1273 php_ctlr = (struct php_ctlr_state_s *) kmalloc(sizeof(struct php_ctlr_state_s), GFP_KERNEL);
1274
1275 if (!php_ctlr) { /* allocate controller state data */
1276 err("%s: HPC controller memory allocation error!\n", __FUNCTION__);
1277 goto abort;
1278 }
1279
1280 memset(php_ctlr, 0, sizeof(struct php_ctlr_state_s));
1281
1282 pdev = dev->port;
1283 php_ctlr->pci_dev = pdev; /* save pci_dev in context */
1284
1285 dbg("%s: pdev->vendor %x pdev->device %x\n", __FUNCTION__,
1286 pdev->vendor, pdev->device);
1287
1288 saved_cap_base = pcie_cap_base;
1289
1290 if ((cap_base = pci_find_capability(pdev, PCI_CAP_ID_EXP)) == 0) {
1291 dbg("%s: Can't find PCI_CAP_ID_EXP (0x10)\n", __FUNCTION__);
1292 goto abort_free_ctlr;
1293 }
1294
8b245e45 1295 ctrl->cap_base = cap_base;
1da177e4
LT		 1296
1297 dbg("%s: pcie_cap_base %x\n", __FUNCTION__, pcie_cap_base);
1298
8b245e45 1299 rc = hp_register_read_word(pdev, CAP_REG(ctrl->cap_base), cap_reg);
1da177e4
LT		 1300 if (rc) {
1301 err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
1302 goto abort_free_ctlr;
1303 }
8b245e45 1304 dbg("%s: CAP_REG offset %x cap_reg %x\n", __FUNCTION__, CAP_REG(ctrl->cap_base), cap_reg);
1da177e4 1305
8b245e45
DS		 1306 if (((cap_reg & SLOT_IMPL) == 0) || (((cap_reg & DEV_PORT_TYPE) != 0x0040)
1307 && ((cap_reg & DEV_PORT_TYPE) != 0x0060))) {
1da177e4
LT		 1308 dbg("%s : This is not a root port or the port is not connected to a slot\n", __FUNCTION__);
1309 goto abort_free_ctlr;
1310 }
1311
8b245e45 1312 rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
1da177e4
LT		 1313 if (rc) {
1314 err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
1315 goto abort_free_ctlr;
1316 }
8b245e45 1317 dbg("%s: SLOT_CAP offset %x slot_cap %x\n", __FUNCTION__, SLOT_CAP(ctrl->cap_base), slot_cap);
1da177e4
LT		 1318
1319 if (!(slot_cap & HP_CAP)) {
1320 dbg("%s : This slot is not hot-plug capable\n", __FUNCTION__);
1321 goto abort_free_ctlr;
1322 }
1323 /* For debugging purpose */
8b245e45 1324 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 1325 if (rc) {
1326 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1327 goto abort_free_ctlr;
1328 }
8b245e45 1329 dbg("%s: SLOT_STATUS offset %x slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4 1330
8b245e45 1331 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
1da177e4
LT		 1332 if (rc) {
1333 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
1334 goto abort_free_ctlr;
1335 }
8b245e45 1336 dbg("%s: SLOT_CTRL offset %x slot_ctrl %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
1da177e4
LT		 1337
1338 if (first) {
1339 spin_lock_init(&hpc_event_lock);
1340 first = 0;
1341 }
1342
1343 dbg("pdev = %p: b:d:f:irq=0x%x:%x:%x:%x\n", pdev, pdev->bus->number,
1344 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
1345 for ( rc = 0; rc < DEVICE_COUNT_RESOURCE; rc++)
1346 if (pci_resource_len(pdev, rc) > 0)
1347 dbg("pci resource[%d] start=0x%lx(len=0x%lx)\n", rc,
1348 pci_resource_start(pdev, rc), pci_resource_len(pdev, rc));
1349
1350 info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device,
1351 pdev->subsystem_vendor, pdev->subsystem_device);
1352
1353 if (pci_enable_device(pdev))
1354 goto abort_free_ctlr;
1355
1356 init_MUTEX(&ctrl->crit_sect);
1357 /* setup wait queue */
1358 init_waitqueue_head(&ctrl->queue);
1359
1360 /* find the IRQ */
1361 php_ctlr->irq = dev->irq;
1362 dbg("HPC interrupt = %d\n", php_ctlr->irq);
1363
1364 /* Save interrupt callback info */
1365 php_ctlr->attention_button_callback = attention_button_callback;
1366 php_ctlr->switch_change_callback = switch_change_callback;
1367 php_ctlr->presence_change_callback = presence_change_callback;
1368 php_ctlr->power_fault_callback = power_fault_callback;
1369 php_ctlr->callback_instance_id = instance_id;
1370
1371 /* return PCI Controller Info */
1372 php_ctlr->slot_device_offset = 0;
1373 php_ctlr->num_slots = 1;
1374
1375 /* Mask Hot-plug Interrupt Enable */
8b245e45 1376 rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 1377 if (rc) {
1378 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
1379 goto abort_free_ctlr;
1380 }
1381
8b245e45 1382 dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 1383 temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
1384
8b245e45 1385 rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 1386 if (rc) {
1387 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
1388 goto abort_free_ctlr;
1389 }
1390 dbg("%s : Mask HPIE hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, temp_word);
1391
8b245e45 1392 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 1393 if (rc) {
1394 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1395 goto abort_free_ctlr;
1396 }
8b245e45
DS		 1397 dbg("%s: Mask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base)
1398 , slot_status);
1da177e4
LT		 1399
1400 temp_word = 0x1F; /* Clear all events */
8b245e45 1401 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 1402 if (rc) {
1403 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
1404 goto abort_free_ctlr;
1405 }
8b245e45 1406 dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 1407
1408 if (pciehp_poll_mode) {/* Install interrupt polling code */
1409 /* Install and start the interrupt polling timer */
1410 init_timer(&php_ctlr->int_poll_timer);
1411 start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
1412 } else {
1413 /* Installs the interrupt handler */
1414 rc = request_irq(php_ctlr->irq, pcie_isr, SA_SHIRQ, MY_NAME, (void *) ctrl);
1415 dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
1416 if (rc) {
1417 err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
1418 goto abort_free_ctlr;
1419 }
1420 }
1421
8b245e45 1422 rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 1423 if (rc) {
1424 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
1425 goto abort_free_ctlr;
1426 }
8b245e45 1427 dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 1428 dbg("%s: slot_cap %x\n", __FUNCTION__, slot_cap);
1429
1430 intr_enable = intr_enable | PRSN_DETECT_ENABLE;
1431
1432 if (ATTN_BUTTN(slot_cap))
1433 intr_enable = intr_enable | ATTN_BUTTN_ENABLE;
1434
1435 if (POWER_CTRL(slot_cap))
1436 intr_enable = intr_enable | PWR_FAULT_DETECT_ENABLE;
1437
1438 if (MRL_SENS(slot_cap))
1439 intr_enable = intr_enable | MRL_DETECT_ENABLE;
1440
1441 temp_word = (temp_word & ~intr_enable) | intr_enable;
1442
1443 if (pciehp_poll_mode) {
1444 temp_word = (temp_word & ~HP_INTR_ENABLE) | 0x0;
1445 } else {
1446 temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
1447 }
1448 dbg("%s: temp_word %x\n", __FUNCTION__, temp_word);
1449
1450 /* Unmask Hot-plug Interrupt Enable for the interrupt notification mechanism case */
8b245e45 1451 rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1da177e4
LT		 1452 if (rc) {
1453 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
1454 goto abort_free_ctlr;
1455 }
1456 dbg("%s : Unmask HPIE hp_register_write_word SLOT_CTRL with %x\n", __FUNCTION__, temp_word);
8b245e45 1457 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 1458 if (rc) {
1459 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1460 goto abort_free_ctlr;
1461 }
1462 dbg("%s: Unmask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__,
8b245e45 1463 SLOT_STATUS(ctrl->cap_base), slot_status);
1da177e4
LT		 1464
1465 temp_word = 0x1F; /* Clear all events */
8b245e45 1466 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 1467 if (rc) {
1468 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
1469 goto abort_free_ctlr;
1470 }
8b245e45 1471 dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), temp_word);
1da177e4
LT		 1472
1473 /* Add this HPC instance into the HPC list */
1474 spin_lock(&list_lock);
1475 if (php_ctlr_list_head == 0) {
1476 php_ctlr_list_head = php_ctlr;
1477 p = php_ctlr_list_head;
1478 p->pnext = NULL;
1479 } else {
1480 p = php_ctlr_list_head;
1481
1482 while (p->pnext)
1483 p = p->pnext;
1484
1485 p->pnext = php_ctlr;
1486 }
1487 spin_unlock(&list_lock);
1488
1489 ctlr_seq_num++;
1490 ctrl->hpc_ctlr_handle = php_ctlr;
1491 ctrl->hpc_ops = &pciehp_hpc_ops;
1492
1493 DBG_LEAVE_ROUTINE
1494 return 0;
1495
1496 /* We end up here for the many possible ways to fail this API. */
1497abort_free_ctlr:
1498 pcie_cap_base = saved_cap_base;
1499 kfree(php_ctlr);
1500abort:
1501 DBG_LEAVE_ROUTINE
1502 return -1;
1503}
Linux 6.x block layer and io_uring tree(s)