tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2014 IBM Corp.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9
10#ifndef _ASM_PNV_PCI_H
11#define _ASM_PNV_PCI_H
12
13#include <linux/pci.h>
14#include <linux/pci_hotplug.h>
15#include <linux/irq.h>
16#include <misc/cxl-base.h>
17#include <asm/opal-api.h>
18
19#define PCI_SLOT_ID_PREFIX (1UL << 63)
20#define PCI_SLOT_ID(phb_id, bdfn) \
21 (PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
22
23extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
24extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
25extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
26extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
27extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
28 struct opal_msg *msg);
29extern int pnv_pci_set_p2p(struct pci_dev *initiator, struct pci_dev *target,
30 u64 desc);
31
32int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
33int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
34 unsigned int virq);
35int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num);
36void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num);
37int pnv_cxl_get_irq_count(struct pci_dev *dev);
38struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev);
39int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq);
40bool is_pnv_opal_msi(struct irq_chip *chip);
41
42#ifdef CONFIG_CXL_BASE
43int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs,
44 struct pci_dev *dev, int num);
45void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs,
46 struct pci_dev *dev);
47
48/* Support for the cxl kernel api on the real PHB (instead of vPHB) */
49int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable);
50bool pnv_pci_on_cxl_phb(struct pci_dev *dev);
51struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose);
52void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu);
53
54#endif
55
56struct pnv_php_slot {
57 struct hotplug_slot slot;
58 struct hotplug_slot_info slot_info;
59 uint64_t id;
60 char *name;
61 int slot_no;
62 unsigned int flags;
63#define PNV_PHP_FLAG_BROKEN_PDC 0x1
64 struct kref kref;
65#define PNV_PHP_STATE_INITIALIZED 0
66#define PNV_PHP_STATE_REGISTERED 1
67#define PNV_PHP_STATE_POPULATED 2
68#define PNV_PHP_STATE_OFFLINE 3
69 int state;
70 int irq;
71 struct workqueue_struct *wq;
72 struct device_node *dn;
73 struct pci_dev *pdev;
74 struct pci_bus *bus;
75 bool power_state_check;
76 void *fdt;
77 void *dt;
78 struct of_changeset ocs;
79 struct pnv_php_slot *parent;
80 struct list_head children;
81 struct list_head link;
82};
83extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
84extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
85 uint8_t state);
86
87#endif