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 88