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 22 extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id); 23 extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len); 24 extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state); 25 extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state); 26 extern int pnv_pci_set_power_state(uint64_t id, uint8_t state, 27 struct opal_msg *msg); 28 29 int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode); 30 int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, 31 unsigned int virq); 32 int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num); 33 void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num); 34 int pnv_cxl_get_irq_count(struct pci_dev *dev); 35 struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev); 36 37 #ifdef CONFIG_CXL_BASE 38 int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs, 39 struct pci_dev *dev, int num); 40 void 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) */ 44 int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable); 45 bool pnv_pci_on_cxl_phb(struct pci_dev *dev); 46 struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose); 47 void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu); 48 49 #endif 50 51 struct 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 }; 74 extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn); 75 extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot, 76 uint8_t state); 77 78 #endif 79