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 <misc/cxl-base.h>
  16#include <asm/opal-api.h>
  17
  18#define PCI_SLOT_ID_PREFIX      0x8000000000000000
  19#define PCI_SLOT_ID(phb_id, bdfn)       \
  20        (PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
  21
  22extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
  23extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
  24extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
  25extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
  26extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
  27                                   struct opal_msg *msg);
  28
  29int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
  30int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
  31                           unsigned int virq);
  32int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num);
  33void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num);
  34int pnv_cxl_get_irq_count(struct pci_dev *dev);
  35struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev);
  36
  37#ifdef CONFIG_CXL_BASE
  38int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs,
  39                               struct pci_dev *dev, int num);
  40void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs,
  41                                  struct pci_dev *dev);
  42
  43/* Support for the cxl kernel api on the real PHB (instead of vPHB) */
  44int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable);
  45bool pnv_pci_on_cxl_phb(struct pci_dev *dev);
  46struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose);
  47void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu);
  48
  49#endif
  50
  51struct pnv_php_slot {
  52        struct hotplug_slot             slot;
  53        struct hotplug_slot_info        slot_info;
  54        uint64_t                        id;
  55        char                            *name;
  56        int                             slot_no;
  57        struct kref                     kref;
  58#define PNV_PHP_STATE_INITIALIZED       0
  59#define PNV_PHP_STATE_REGISTERED        1
  60#define PNV_PHP_STATE_POPULATED         2
  61#define PNV_PHP_STATE_OFFLINE           3
  62        int                             state;
  63        struct device_node              *dn;
  64        struct pci_dev                  *pdev;
  65        struct pci_bus                  *bus;
  66        bool                            power_state_check;
  67        void                            *fdt;
  68        void                            *dt;
  69        struct of_changeset             ocs;
  70        struct pnv_php_slot             *parent;
  71        struct list_head                children;
  72        struct list_head                link;
  73};
  74extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
  75extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
  76                                        uint8_t state);
  77
  78#endif
  79