LXR linux/arch/powerpc/include/asm/pnv-pci.h

   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
  32extern int pnv_pci_enable_tunnel(struct pci_dev *dev, uint64_t *asnind);
  33extern int pnv_pci_disable_tunnel(struct pci_dev *dev);
  34extern int pnv_pci_set_tunnel_bar(struct pci_dev *dev, uint64_t addr,
  35                                  int enable);
  36extern int pnv_pci_get_as_notify_info(struct task_struct *task, u32 *lpid,
  37                                      u32 *pid, u32 *tid);
  38int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
  39int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
  40                           unsigned int virq);
  41int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num);
  42void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num);
  43int pnv_cxl_get_irq_count(struct pci_dev *dev);
  44struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev);
  45int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq);
  46bool is_pnv_opal_msi(struct irq_chip *chip);
  47
  48#ifdef CONFIG_CXL_BASE
  49int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs,
  50                               struct pci_dev *dev, int num);
  51void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs,
  52                                  struct pci_dev *dev);
  53
  54/* Support for the cxl kernel api on the real PHB (instead of vPHB) */
  55int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable);
  56bool pnv_pci_on_cxl_phb(struct pci_dev *dev);
  57struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose);
  58void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu);
  59
  60#endif
  61
  62struct pnv_php_slot {
  63        struct hotplug_slot             slot;
  64        uint64_t                        id;
  65        char                            *name;
  66        int                             slot_no;
  67        unsigned int                    flags;
  68#define PNV_PHP_FLAG_BROKEN_PDC         0x1
  69        struct kref                     kref;
  70#define PNV_PHP_STATE_INITIALIZED       0
  71#define PNV_PHP_STATE_REGISTERED        1
  72#define PNV_PHP_STATE_POPULATED         2
  73#define PNV_PHP_STATE_OFFLINE           3
  74        int                             state;
  75        int                             irq;
  76        struct workqueue_struct         *wq;
  77        struct device_node              *dn;
  78        struct pci_dev                  *pdev;
  79        struct pci_bus                  *bus;
  80        bool                            power_state_check;
  81        u8                              attention_state;
  82        void                            *fdt;
  83        void                            *dt;
  84        struct of_changeset             ocs;
  85        struct pnv_php_slot             *parent;
  86        struct list_head                children;
  87        struct list_head                link;
  88};
  89extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
  90extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
  91                                        uint8_t state);
  92
  93#endif
  94