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| author | Koichiro Den <den@valinux.co.jp> | 2026-03-12 16:02:31 +0300 |
|---|---|---|
| committer | Manivannan Sadhasivam <mani@kernel.org> | 2026-03-15 19:34:28 +0300 |
| commit | f51644eb40a73677fcd0c92d8174eddde5d0be0e (patch) | |
| tree | 0b301fce349fb48416333525a9e459e753ed8618 /include/linux/memory_hotplug.h | |
| parent | 27ce1d8ecb9b9ae025b9e9e199845624bc950998 (diff) | |
| download | linux-f51644eb40a73677fcd0c92d8174eddde5d0be0e.tar.xz | |
PCI: endpoint: Describe reserved subregions within BARs
Some endpoint controllers expose platform-owned, fixed register windows
within a BAR that EPF drivers must not reprogram (e.g. a BAR marked
BAR_RESERVED). Even in that case, EPF drivers may need to reference a
well-defined subset of that BAR, e.g. to reuse an integrated DMA
controller MMIO window as a doorbell target.
Introduce struct pci_epc_bar_rsvd_region and extend struct
pci_epc_bar_desc so EPC drivers can advertise such fixed subregions in a
controller-agnostic way.
No functional change for existing users.
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Tested-by: Koichiro Den <den@valinux.co.jp>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260312130229.2282001-15-cassel@kernel.org
Diffstat (limited to 'include/linux/memory_hotplug.h')
0 files changed, 0 insertions, 0 deletions