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PCI: Add 'override_only' field to struct pci_device_id

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Add 'override_only' field to struct pci_device_id to be used as part of
pci_match_device().

When set, a driver only matches the entry when dev->driver_override is
set to that driver.

In addition, add a helper macro named 'PCI_DEVICE_DRIVER_OVERRIDE' to
enable setting some data on it.

Next patch from this series will use the above functionality.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20210826103912.128972-10-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Max Gurtovoy
2021-08-26 13:39:08 +03:00
committed by Alex Williamson
parent c61302aa48
commit 343b725868
4 changed files with 39 additions and 7 deletions
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15
include/linux/pci.h
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@@ -901,6 +901,21 @@ struct pci_driver {
.vendor = (vend), .device = (dev), \
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
/**
* PCI_DEVICE_DRIVER_OVERRIDE - macro used to describe a PCI device with
* override_only flags.
* @vend: the 16 bit PCI Vendor ID
* @dev: the 16 bit PCI Device ID
* @driver_override: the 32 bit PCI Device override_only
*
* This macro is used to create a struct pci_device_id that matches only a
* driver_override device. The subvendor and subdevice fields will be set to
* PCI_ANY_ID.
*/
#define PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, driver_override) \
.vendor = (vend), .device = (dev), .subvendor = PCI_ANY_ID, \
.subdevice = PCI_ANY_ID, .override_only = (driver_override)
/**
* PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
* @vend: the 16 bit PCI Vendor ID