root/arch/powerpc/include/asm/pnv-pci.h

INCLUDED FROM

   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 <misc/cxl-base.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 
  19 extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
  20 extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
  21 extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
  22 extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
  23 extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
  24                                    struct opal_msg *msg);
  25 
  26 extern int pnv_pci_set_tunnel_bar(struct pci_dev *dev, uint64_t addr,
  27                                   int enable);
  28 int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
  29 int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
  30                            unsigned int virq);
  31 int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num);
  32 void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num);
  33 int pnv_cxl_get_irq_count(struct pci_dev *dev);
  34 struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev);
  35 int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq);
  36 bool is_pnv_opal_msi(struct irq_chip *chip);
  37 
  38 #ifdef CONFIG_CXL_BASE
  39 int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs,
  40                                struct pci_dev *dev, int num);
  41 void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs,
  42                                   struct pci_dev *dev);
  43 #endif
  44 
  45 struct pnv_php_slot {
  46         struct hotplug_slot             slot;
  47         uint64_t                        id;
  48         char                            *name;
  49         int                             slot_no;
  50         unsigned int                    flags;
  51 #define PNV_PHP_FLAG_BROKEN_PDC         0x1
  52         struct kref                     kref;
  53 #define PNV_PHP_STATE_INITIALIZED       0
  54 #define PNV_PHP_STATE_REGISTERED        1
  55 #define PNV_PHP_STATE_POPULATED         2
  56 #define PNV_PHP_STATE_OFFLINE           3
  57         int                             state;
  58         int                             irq;
  59         struct workqueue_struct         *wq;
  60         struct device_node              *dn;
  61         struct pci_dev                  *pdev;
  62         struct pci_bus                  *bus;
  63         bool                            power_state_check;
  64         u8                              attention_state;
  65         void                            *fdt;
  66         void                            *dt;
  67         struct of_changeset             ocs;
  68         struct pnv_php_slot             *parent;
  69         struct list_head                children;
  70         struct list_head                link;
  71 };
  72 extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
  73 extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
  74                                         uint8_t state);
  75 
  76 #endif