summaryrefslogtreecommitdiffstats
path: root/drivers/pci/hotplug/pciehp.h
blob: f313121d51414d9a3f12bf26bea28a6bfe0b2bcc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
/*
 * PCI Express Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 * Copyright (C) 2003-2004 Intel Corporation
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
 *
 */
#ifndef _PCIEHP_H
#define _PCIEHP_H

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <asm/semaphore.h>
#include <asm/io.h>		
#include <linux/pcieport_if.h>
#include "pci_hotplug.h"

#define MY_NAME	"pciehp"

extern int pciehp_poll_mode;
extern int pciehp_poll_time;
extern int pciehp_debug;

/*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
#define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)

struct pci_func {
	struct pci_func *next;
	u8 bus;
	u8 device;
	u8 function;
	u8 is_a_board;
	u16 status;
	u8 configured;
	u8 switch_save;
	u8 presence_save;
	u32 base_length[0x06];
	u8 base_type[0x06];
	u16 reserved2;
	u32 config_space[0x20];
	struct pci_resource *mem_head;
	struct pci_resource *p_mem_head;
	struct pci_resource *io_head;
	struct pci_resource *bus_head;
	struct pci_dev* pci_dev;
};

struct slot {
	struct slot *next;
	u8 bus;
	u8 device;
	u32 number;
	u8 is_a_board;
	u8 configured;
	u8 state;
	u8 switch_save;
	u8 presence_save;
	u32 capabilities;
	u16 reserved2;
	struct timer_list task_event;
	u8 hp_slot;
	struct controller *ctrl;
	struct hpc_ops *hpc_ops;
	struct hotplug_slot *hotplug_slot;
	struct list_head	slot_list;
};

struct pci_resource {
	struct pci_resource * next;
	u32 base;
	u32 length;
};

struct event_info {
	u32 event_type;
	u8 hp_slot;
};

struct controller {
	struct controller *next;
	struct semaphore crit_sect;	/* critical section semaphore */
	void *hpc_ctlr_handle;		/* HPC controller handle */
	int num_slots;			/* Number of slots on ctlr */
	int slot_num_inc;		/* 1 or -1 */
	struct pci_resource *mem_head;
	struct pci_resource *p_mem_head;
	struct pci_resource *io_head;
	struct pci_resource *bus_head;
	struct pci_dev *pci_dev;
	struct pci_bus *pci_bus;
	struct event_info event_queue[10];
	struct slot *slot;
	struct hpc_ops *hpc_ops;
	wait_queue_head_t queue;	/* sleep & wake process */
	u8 next_event;
	u8 seg;
	u8 bus;
	u8 device;
	u8 function;
	u8 rev;
	u8 slot_device_offset;
	u8 add_support;
	enum pci_bus_speed speed;
	u32 first_slot;		/* First physical slot number */  /* PCIE only has 1 slot */
	u8 slot_bus;		/* Bus where the slots handled by this controller sit */
	u8 ctrlcap;
	u16 vendor_id;
};

struct irq_mapping {
	u8 barber_pole;
	u8 valid_INT;
	u8 interrupt[4];
};

struct resource_lists {
	struct pci_resource *mem_head;
	struct pci_resource *p_mem_head;
	struct pci_resource *io_head;
	struct pci_resource *bus_head;
	struct irq_mapping *irqs;
};

#define INT_BUTTON_IGNORE		0
#define INT_PRESENCE_ON			1
#define INT_PRESENCE_OFF		2
#define INT_SWITCH_CLOSE		3
#define INT_SWITCH_OPEN			4
#define INT_POWER_FAULT			5
#define INT_POWER_FAULT_CLEAR		6
#define INT_BUTTON_PRESS		7
#define INT_BUTTON_RELEASE		8
#define INT_BUTTON_CANCEL		9

#define STATIC_STATE			0
#define BLINKINGON_STATE		1
#define BLINKINGOFF_STATE		2
#define POWERON_STATE			3
#define POWEROFF_STATE			4

#define PCI_TO_PCI_BRIDGE_CLASS		0x00060400

/* Error messages */
#define INTERLOCK_OPEN			0x00000002
#define ADD_NOT_SUPPORTED		0x00000003
#define CARD_FUNCTIONING		0x00000005
#define ADAPTER_NOT_SAME		0x00000006
#define NO_ADAPTER_PRESENT		0x00000009
#define NOT_ENOUGH_RESOURCES		0x0000000B
#define DEVICE_TYPE_NOT_SUPPORTED	0x0000000C
#define WRONG_BUS_FREQUENCY		0x0000000D
#define POWER_FAILURE			0x0000000E

#define REMOVE_NOT_SUPPORTED		0x00000003

#define DISABLE_CARD			1

/* Field definitions in Slot Capabilities Register */
#define ATTN_BUTTN_PRSN	0x00000001
#define	PWR_CTRL_PRSN	0x00000002
#define MRL_SENS_PRSN	0x00000004
#define ATTN_LED_PRSN	0x00000008
#define PWR_LED_PRSN	0x00000010
#define HP_SUPR_RM_SUP	0x00000020

#define ATTN_BUTTN(cap)		(cap & ATTN_BUTTN_PRSN)
#define POWER_CTRL(cap)		(cap & PWR_CTRL_PRSN)
#define MRL_SENS(cap)		(cap & MRL_SENS_PRSN)
#define ATTN_LED(cap)		(cap & ATTN_LED_PRSN)
#define PWR_LED(cap)		(cap & PWR_LED_PRSN) 
#define HP_SUPR_RM(cap)		(cap & HP_SUPR_RM_SUP)

/*
 * error Messages
 */
#define msg_initialization_err	"Initialization failure, error=%d\n"
#define msg_HPC_rev_error	"Unsupported revision of the PCI hot plug controller found.\n"
#define msg_HPC_non_pcie	"The PCI hot plug controller is not supported by this driver.\n"
#define msg_HPC_not_supported	"This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
#define msg_unable_to_save	"Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
#define msg_button_on		"PCI slot #%d - powering on due to button press.\n"
#define msg_button_off		"PCI slot #%d - powering off due to button press.\n"
#define msg_button_cancel	"PCI slot #%d - action canceled due to button press.\n"
#define msg_button_ignore	"PCI slot #%d - button press ignored.  (action in progress...)\n"

/* controller functions */
extern int	pciehprm_find_available_resources	(struct controller *ctrl);
extern int	pciehp_event_start_thread	(void);
extern void	pciehp_event_stop_thread	(void);
extern struct 	pci_func *pciehp_slot_create	(unsigned char busnumber);
extern struct 	pci_func *pciehp_slot_find	(unsigned char bus, unsigned char device, unsigned char index);
extern int	pciehp_enable_slot		(struct slot *slot);
extern int	pciehp_disable_slot		(struct slot *slot);

extern u8	pciehp_handle_attention_button	(u8 hp_slot, void *inst_id);
extern u8	pciehp_handle_switch_change	(u8 hp_slot, void *inst_id);
extern u8	pciehp_handle_presence_change	(u8 hp_slot, void *inst_id);
extern u8	pciehp_handle_power_fault	(u8 hp_slot, void *inst_id);
/* extern void	long_delay (int delay); */

/* resource functions */
extern int	pciehp_resource_sort_and_combine	(struct pci_resource **head);

/* pci functions */
extern int	pciehp_set_irq			(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
/*extern int	pciehp_get_bus_dev		(struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
extern int	pciehp_save_config	 	(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
extern int	pciehp_save_used_resources	(struct controller *ctrl, struct pci_func * func, int flag);
extern int	pciehp_save_slot_config		(struct controller *ctrl, struct pci_func * new_slot);
extern void	pciehp_destroy_board_resources	(struct pci_func * func);
extern int	pciehp_return_board_resources	(struct pci_func * func, struct resource_lists * resources);
extern void	pciehp_destroy_resource_list	(struct resource_lists * resources);
extern int	pciehp_configure_device		(struct controller* ctrl, struct pci_func* func);
extern int	pciehp_unconfigure_device	(struct pci_func* func);


/* Global variables */
extern struct controller *pciehp_ctrl_list;
extern struct pci_func *pciehp_slot_list[256];

/* Inline functions */

static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
{
	struct slot *p_slot, *tmp_slot = NULL;

	p_slot = ctrl->slot;

	dbg("p_slot = %p\n", p_slot);

	while (p_slot && (p_slot->device != device)) {
		tmp_slot = p_slot;
		p_slot = p_slot->next;
		dbg("In while loop, p_slot = %p\n", p_slot);
	}
	if (p_slot == NULL) {
		err("ERROR: pciehp_find_slot device=0x%x\n", device);
		p_slot = tmp_slot;
	}

	return p_slot;
}

static inline int wait_for_ctrl_irq(struct controller *ctrl)
{
	int retval = 0;

	DECLARE_WAITQUEUE(wait, current);

	dbg("%s : start\n", __FUNCTION__);
	add_wait_queue(&ctrl->queue, &wait);
	if (!pciehp_poll_mode)
		/* Sleep for up to 1 second */
		msleep_interruptible(1000);
	else
		msleep_interruptible(2500);
	
	remove_wait_queue(&ctrl->queue, &wait);
	if (signal_pending(current))
		retval =  -EINTR;

	dbg("%s : end\n", __FUNCTION__);
	return retval;
}

/* Puts node back in the resource list pointed to by head */
static inline void return_resource(struct pci_resource **head, struct pci_resource *node)
{
	if (!node || !head)
		return;
	node->next = *head;
	*head = node;
}

#define SLOT_NAME_SIZE 10

static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
{
	snprintf(buffer, buffer_size, "%d", slot->number);
}

enum php_ctlr_type {
	PCI,
	ISA,
	ACPI
};

typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);

int pcie_init(struct controller *ctrl, struct pcie_device *dev,
		php_intr_callback_t attention_button_callback,
		php_intr_callback_t switch_change_callback,
		php_intr_callback_t presence_change_callback,
		php_intr_callback_t power_fault_callback);


/* This has no meaning for PCI Express, as there is only 1 slot per port */
int pcie_get_ctlr_slot_config(struct controller *ctrl,
		int *num_ctlr_slots,
		int *first_device_num,
		int *physical_slot_num,
		u8 *ctrlcap);

struct hpc_ops {
	int	(*power_on_slot)	(struct slot *slot);
	int	(*power_off_slot)	(struct slot *slot);
	int	(*get_power_status)	(struct slot *slot, u8 *status);
	int	(*get_attention_status)	(struct slot *slot, u8 *status);
	int	(*set_attention_status)	(struct slot *slot, u8 status);
	int	(*get_latch_status)	(struct slot *slot, u8 *status);
	int	(*get_adapter_status)	(struct slot *slot, u8 *status);

	int	(*get_max_bus_speed)	(struct slot *slot, enum pci_bus_speed *speed);
	int	(*get_cur_bus_speed)	(struct slot *slot, enum pci_bus_speed *speed);

	int	(*get_max_lnk_width)	(struct slot *slot, enum pcie_link_width *value);
	int	(*get_cur_lnk_width)	(struct slot *slot, enum pcie_link_width *value);
	
	int	(*query_power_fault)	(struct slot *slot);
	void	(*green_led_on)		(struct slot *slot);
	void	(*green_led_off)	(struct slot *slot);
	void	(*green_led_blink)	(struct slot *slot);
	void	(*release_ctlr)		(struct controller *ctrl);
	int	(*check_lnk_status)	(struct controller *ctrl);
};

#endif				/* _PCIEHP_H */
OpenPOWER on IntegriCloud