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PCI: Move config space size macros to pci_regs.h

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Move PCI configuration space size macros (PCI_CFG_SPACE_SIZE and
PCI_CFG_SPACE_EXP_SIZE) from drivers/pci/pci.h to
include/uapi/linux/pci_regs.h so they can be used by more drivers and
eliminate duplicate definitions.

[bhelgaas: Expand comment to include PCI-X details]
Signed-off-by: Wang Sheng-Hui <shhuiw@foxmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Wang Sheng-Hui
2016-09-22 09:05:46 +08:00
committed by Bjorn Helgaas
parent 1001354ca3
commit cc10385b6f
3 changed files with 8 additions and 5 deletions
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8
include/uapi/linux/pci_regs.h
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@@ -22,6 +22,14 @@
#ifndef LINUX_PCI_REGS_H
#define LINUX_PCI_REGS_H
/*
* Conventional PCI and PCI-X Mode 1 devices have 256 bytes of
* configuration space. PCI-X Mode 2 and PCIe devices have 4096 bytes of
* configuration space.
*/
#define PCI_CFG_SPACE_SIZE 256
#define PCI_CFG_SPACE_EXP_SIZE 4096
/*
* Under PCI, each device has 256 bytes of configuration address space,
* of which the first 64 bytes are standardized as follows: