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
  23 extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
  24 extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
  25 extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
  26 extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
  27 extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
  28                                    struct opal_msg *msg);
  29 extern int pnv_pci_set_p2p(struct pci_dev *initiator, struct pci_dev *target,
  30                            u64 desc);
  31
  32 int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
  33 int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
  34                            unsigned int virq);
  35 int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num);
  36 void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num);
  37 int pnv_cxl_get_irq_count(struct pci_dev *dev);
  38 struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev);
  39 int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq);
  40 bool is_pnv_opal_msi(struct irq_chip *chip);
  41
  42 #ifdef CONFIG_CXL_BASE
  43 int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs,
  44                                struct pci_dev *dev, int num);
  45 void 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) */
  49 int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable);
  50 bool pnv_pci_on_cxl_phb(struct pci_dev *dev);
  51 struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose);
  52 void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu);
  53
  54 #endif
  55
  56 struct 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 };
  83 extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
  84 extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
  85                                         uint8_t state);
  86
  87 #endif