b43d451385
If MSI-X interrupt mode is used by the PCI Express port driver, too many vectors are allocated and it is not ensured that the right vectors will be used for the right services. Namely, the PCI Express specification states that both PCI Express native PME and PCI Express hotplug will always use the same MSI or MSI-X message for signalling interrupts, which implies that the same vector will be used by both of them. Also, the VC service does not use interrupts at all. Moreover, is not clear which of the vectors allocated by pci_enable_msix() in the current code will be used for PME and hotplug and which of them will be used for AER if all of these services are configured. For these reasons, rework the allocation of interrupts for PCI Express ports so that if MSI-X are enabled, the right vectors will be used for the right purposes. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
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* File: pcieport_if.h
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* Purpose: PCI Express Port Bus Driver's IF Data Structure
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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*/
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#ifndef _PCIEPORT_IF_H_
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#define _PCIEPORT_IF_H_
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/* Port Type */
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#define PCIE_RC_PORT 4 /* Root port of RC */
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#define PCIE_SW_UPSTREAM_PORT 5 /* Upstream port of Switch */
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#define PCIE_SW_DOWNSTREAM_PORT 6 /* Downstream port of Switch */
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#define PCIE_ANY_PORT 7
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/* Service Type */
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#define PCIE_PORT_SERVICE_PME_SHIFT 0 /* Power Management Event */
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#define PCIE_PORT_SERVICE_PME (1 << PCIE_PORT_SERVICE_PME_SHIFT)
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#define PCIE_PORT_SERVICE_AER_SHIFT 1 /* Advanced Error Reporting */
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#define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT)
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#define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */
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#define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT)
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#define PCIE_PORT_SERVICE_VC_SHIFT 3 /* Virtual Channel */
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#define PCIE_PORT_SERVICE_VC (1 << PCIE_PORT_SERVICE_VC_SHIFT)
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/* Root/Upstream/Downstream Port's Interrupt Mode */
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#define PCIE_PORT_NO_IRQ (-1)
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#define PCIE_PORT_INTx_MODE 0
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#define PCIE_PORT_MSI_MODE 1
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#define PCIE_PORT_MSIX_MODE 2
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struct pcie_port_data {
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int port_type; /* Type of the port */
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int port_irq_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
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};
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struct pcie_device {
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int irq; /* Service IRQ/MSI/MSI-X Vector */
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struct pci_dev *port; /* Root/Upstream/Downstream Port */
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u32 service; /* Port service this device represents */
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void *priv_data; /* Service Private Data */
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struct device device; /* Generic Device Interface */
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};
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#define to_pcie_device(d) container_of(d, struct pcie_device, device)
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static inline void set_service_data(struct pcie_device *dev, void *data)
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{
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dev->priv_data = data;
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}
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static inline void* get_service_data(struct pcie_device *dev)
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{
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return dev->priv_data;
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}
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struct pcie_port_service_driver {
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const char *name;
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int (*probe) (struct pcie_device *dev);
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void (*remove) (struct pcie_device *dev);
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int (*suspend) (struct pcie_device *dev, pm_message_t state);
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int (*resume) (struct pcie_device *dev);
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/* Service Error Recovery Handler */
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struct pci_error_handlers *err_handler;
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/* Link Reset Capability - AER service driver specific */
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pci_ers_result_t (*reset_link) (struct pci_dev *dev);
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int port_type; /* Type of the port this driver can handle */
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u32 service; /* Port service this device represents */
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struct device_driver driver;
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};
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#define to_service_driver(d) \
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container_of(d, struct pcie_port_service_driver, driver)
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extern int pcie_port_service_register(struct pcie_port_service_driver *new);
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extern void pcie_port_service_unregister(struct pcie_port_service_driver *new);
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#endif /* _PCIEPORT_IF_H_ */
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