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 30 int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode); 31 int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, 32 unsigned int virq); 33 int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num); 34 void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num); 35 int pnv_cxl_get_irq_count(struct pci_dev *dev); 36 struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev); 37 int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq); 38 bool is_pnv_opal_msi(struct irq_chip *chip); 39 40 #ifdef CONFIG_CXL_BASE 41 int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs, 42 struct pci_dev *dev, int num); 43 void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs, 44 struct pci_dev *dev); 45 46 /* Support for the cxl kernel api on the real PHB (instead of vPHB) */ 47 int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable); 48 bool pnv_pci_on_cxl_phb(struct pci_dev *dev); 49 struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose); 50 void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu); 51 52 #endif 53 54 struct pnv_php_slot { 55 struct hotplug_slot slot; 56 struct hotplug_slot_info slot_info; 57 uint64_t id; 58 char *name; 59 int slot_no; 60 unsigned int flags; 61 #define PNV_PHP_FLAG_BROKEN_PDC 0x1 62 struct kref kref; 63 #define PNV_PHP_STATE_INITIALIZED 0 64 #define PNV_PHP_STATE_REGISTERED 1 65 #define PNV_PHP_STATE_POPULATED 2 66 #define PNV_PHP_STATE_OFFLINE 3 67 int state; 68 int irq; 69 struct workqueue_struct *wq; 70 struct device_node *dn; 71 struct pci_dev *pdev; 72 struct pci_bus *bus; 73 bool power_state_check; 74 void *fdt; 75 void *dt; 76 struct of_changeset ocs; 77 struct pnv_php_slot *parent; 78 struct list_head children; 79 struct list_head link; 80 }; 81 extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn); 82 extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot, 83 uint8_t state); 84 85 #endif 86