mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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454593e54c
We're supporting surprise hotplug on PCI slots behind root port or PCIe switch downstream ports, which don't claim the capability in hardware register (offset: PCIe cap + PCI_EXP_SLTCAP). PEX8718 is one of the examples. For those PCI slots, the PDC (Presence Detection Change) event isn't reliable and the underly (skiboot) firmware has best judgement. This masks the PDC event when skiboot requests by "ibm,slot-broken-pdc" property in PCI slot's device-tree node. Reported-by: Hank Chang <hankmax0000@gmail.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Tested-by: Willie Liauw <williel@supermicro.com.tw> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/*
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* Copyright 2014 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_PNV_PCI_H
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#define _ASM_PNV_PCI_H
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#include <linux/pci.h>
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#include <linux/pci_hotplug.h>
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#include <linux/irq.h>
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#include <misc/cxl-base.h>
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#include <asm/opal-api.h>
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#define PCI_SLOT_ID_PREFIX (1UL << 63)
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#define PCI_SLOT_ID(phb_id, bdfn) \
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(PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
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extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
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extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
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extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
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extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
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extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
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struct opal_msg *msg);
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int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
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int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
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unsigned int virq);
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int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num);
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void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num);
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int pnv_cxl_get_irq_count(struct pci_dev *dev);
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struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev);
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int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq);
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bool is_pnv_opal_msi(struct irq_chip *chip);
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#ifdef CONFIG_CXL_BASE
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int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs,
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struct pci_dev *dev, int num);
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void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs,
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struct pci_dev *dev);
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/* Support for the cxl kernel api on the real PHB (instead of vPHB) */
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int pnv_cxl_enable_phb_kernel_api(struct pci_controller *hose, bool enable);
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bool pnv_pci_on_cxl_phb(struct pci_dev *dev);
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struct cxl_afu *pnv_cxl_phb_to_afu(struct pci_controller *hose);
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void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu);
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#endif
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struct pnv_php_slot {
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struct hotplug_slot slot;
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struct hotplug_slot_info slot_info;
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uint64_t id;
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char *name;
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int slot_no;
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unsigned int flags;
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#define PNV_PHP_FLAG_BROKEN_PDC 0x1
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struct kref kref;
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#define PNV_PHP_STATE_INITIALIZED 0
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#define PNV_PHP_STATE_REGISTERED 1
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#define PNV_PHP_STATE_POPULATED 2
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#define PNV_PHP_STATE_OFFLINE 3
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int state;
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int irq;
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struct workqueue_struct *wq;
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struct device_node *dn;
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struct pci_dev *pdev;
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struct pci_bus *bus;
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bool power_state_check;
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void *fdt;
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void *dt;
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struct of_changeset ocs;
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struct pnv_php_slot *parent;
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struct list_head children;
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struct list_head link;
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};
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extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
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extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
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uint8_t state);
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#endif
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