1864f12fda
Add pcie_find_dsn() to detect and match PCIe device serial number. In addition, vendor ID is matched when provided. Change-Id: I54b6dc42c8da47cd7b4447ab23a6a21562c7618 Signed-off-by: Jonathan Zhang <jonzhang@meta.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/54510 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef DEVICE_PCIEXP_H
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#define DEVICE_PCIEXP_H
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/* (c) 2005 Linux Networx GPL see COPYING for details */
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enum aspm_type {
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PCIE_ASPM_NONE = 0,
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PCIE_ASPM_L0S = 1,
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PCIE_ASPM_L1 = 2,
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PCIE_ASPM_BOTH = 3,
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};
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#define ASPM_LTR_L12_THRESHOLD_VALUE_OFFSET 16
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#define ASPM_LTR_L12_THRESHOLD_VALUE_MASK (0x3ff << ASPM_LTR_L12_THRESHOLD_VALUE_OFFSET)
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#define ASPM_LTR_L12_THRESHOLD_SCALE_OFFSET 29
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#define ASPM_LTR_L12_THRESHOLD_SCALE_MASK (0x7 << ASPM_LTR_L12_THRESHOLD_SCALE_OFFSET)
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/* Latency tolerance reporting, max non-snoop latency value 3.14ms */
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#define PCIE_LTR_MAX_NO_SNOOP_LATENCY_3146US 0x1003
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/* Latency tolerance reporting, max snoop latency value 3.14ms */
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#define PCIE_LTR_MAX_SNOOP_LATENCY_3146US 0x1003
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void pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
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unsigned int max_devfn);
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void pciexp_scan_bridge(struct device *dev);
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extern struct device_operations default_pciexp_ops_bus;
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void pciexp_hotplug_scan_bridge(struct device *dev);
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extern struct device_operations default_pciexp_hotplug_ops_bus;
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unsigned int pciexp_find_extended_cap(const struct device *dev, unsigned int cap,
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unsigned int offset);
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unsigned int pciexp_find_ext_vendor_cap(const struct device *dev, unsigned int cap,
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unsigned int offset);
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static inline bool pciexp_is_downstream_port(int type)
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{
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return type == PCI_EXP_TYPE_ROOT_PORT ||
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type == PCI_EXP_TYPE_DOWNSTREAM ||
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type == PCI_EXP_TYPE_PCIE_BRIDGE;
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}
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struct device *pcie_find_dsn(const uint64_t serial, const uint16_t vid,
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struct device *from);
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bool pciexp_get_ltr_max_latencies(struct device *dev, u16 *max_snoop, u16 *max_nosnoop);
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#endif /* DEVICE_PCIEXP_H */
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