pciexp.h

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#ifndef DEVICE_PCIEXP_H
#define DEVICE_PCIEXP_H
/* (c) 2005 Linux Networx GPL see COPYING for details */
 
enum aspm_type {
        PCIE_ASPM_NONE = 0,
        PCIE_ASPM_L0S  = 1,
        PCIE_ASPM_L1   = 2,
        PCIE_ASPM_BOTH = 3,
};
 
#define ASPM_LTR_L12_THRESHOLD_VALUE_OFFSET 16
#define ASPM_LTR_L12_THRESHOLD_VALUE_MASK (0x3ff << ASPM_LTR_L12_THRESHOLD_VALUE_OFFSET)
#define ASPM_LTR_L12_THRESHOLD_SCALE_OFFSET 29
#define ASPM_LTR_L12_THRESHOLD_SCALE_MASK (0x7 << ASPM_LTR_L12_THRESHOLD_SCALE_OFFSET)
 
/* Latency tolerance reporting, max non-snoop latency value 3.14ms */
#define PCIE_LTR_MAX_NO_SNOOP_LATENCY_3146US 0x1003
/* Latency tolerance reporting, max snoop latency value 3.14ms */
#define PCIE_LTR_MAX_SNOOP_LATENCY_3146US 0x1003
 
void pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
                             unsigned int max_devfn);
 
void pciexp_scan_bridge(struct device *dev);
 
extern struct device_operations default_pciexp_ops_bus;
 
void pciexp_hotplug_scan_bridge(struct device *dev);
 
extern struct device_operations default_pciexp_hotplug_ops_bus;
 
unsigned int pciexp_find_extended_cap(const struct device *dev, unsigned int cap);
unsigned int pciexp_find_next_extended_cap(const struct device *dev, unsigned int cap,
                                           unsigned int offset);
 
static inline bool pciexp_is_downstream_port(int type)
{
        return type == PCI_EXP_TYPE_ROOT_PORT ||
               type == PCI_EXP_TYPE_DOWNSTREAM ||
               type == PCI_EXP_TYPE_PCIE_BRIDGE;
}
 
bool pciexp_get_ltr_max_latencies(struct device *dev, u16 *max_snoop, u16 *max_nosnoop);
 
#endif /* DEVICE_PCIEXP_H */