1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright 2014 IBM Corp.
4  */
5 
6 #ifndef _ASM_PNV_PCI_H
7 #define _ASM_PNV_PCI_H
8 
9 #include <linux/pci.h>
10 #include <linux/pci_hotplug.h>
11 #include <linux/irq.h>
12 #include <linux/of.h>
13 #include <asm/opal-api.h>
14 
15 #define PCI_SLOT_ID_PREFIX	(1UL << 63)
16 #define PCI_SLOT_ID(phb_id, bdfn)	\
17 	(PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
18 #define PCI_PHB_SLOT_ID(phb_id)		(phb_id)
19 
20 extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
21 extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
22 extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
23 extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
24 extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
25 				   struct opal_msg *msg);
26 
27 int64_t pnv_opal_pci_msi_eoi(struct irq_data *d);
28 bool is_pnv_opal_msi(struct irq_chip *chip);
29 
30 struct pnv_php_slot {
31 	struct hotplug_slot		slot;
32 	uint64_t			id;
33 	char				*name;
34 	int				slot_no;
35 	unsigned int			flags;
36 #define PNV_PHP_FLAG_BROKEN_PDC		0x1
37 	struct kref			kref;
38 #define PNV_PHP_STATE_INITIALIZED	0
39 #define PNV_PHP_STATE_REGISTERED	1
40 #define PNV_PHP_STATE_POPULATED		2
41 #define PNV_PHP_STATE_OFFLINE		3
42 	int				state;
43 	int				irq;
44 	struct workqueue_struct		*wq;
45 	struct device_node		*dn;
46 	struct pci_dev			*pdev;
47 	struct pci_bus			*bus;
48 	bool				power_state_check;
49 	u8				attention_state;
50 	void				*fdt;
51 	void				*dt;
52 	struct of_changeset		ocs;
53 	struct pnv_php_slot		*parent;
54 	struct list_head		children;
55 	struct list_head		link;
56 };
57 extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
58 extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
59 					uint8_t state);
60 
61 #endif
62