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From: Manikanta Maddireddy <mmaddireddy@nvidia.com>
To: <bhelgaas@google.com>, <lpieralisi@kernel.org>,
	<kwilczynski@kernel.org>, <mani@kernel.org>, <robh@kernel.org>,
	<krzk+dt@kernel.org>, <conor+dt@kernel.org>,
	<thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
	<kishon@kernel.org>, <arnd@arndb.de>,
	<gregkh@linuxfoundation.org>, <Frank.Li@nxp.com>,
	<den@valinux.co.jp>, <hongxing.zhu@nxp.com>,
	<jingoohan1@gmail.com>, <vidyas@nvidia.com>, <cassel@kernel.org>,
	<18255117159@163.com>
Cc: <linux-pci@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	Manikanta Maddireddy <mmaddireddy@nvidia.com>
Subject: [PATCH v2 2/5] PCI: endpoint: Allow only_64bit on BAR_RESERVED
Date: Tue, 3 Mar 2026 12:50:01 +0530	[thread overview]
Message-ID: <20260303072004.2384079-3-mmaddireddy@nvidia.com> (raw)
In-Reply-To: <20260303072004.2384079-1-mmaddireddy@nvidia.com>

Remove the documentation that forbids setting only_64bit on a BAR of
type BAR_RESERVED.

When a reserved BAR is 64-bit by default, setting only_64bit is the
most accurate description. If we later add support to disable a
reserved BAR (e.g. disable_bar() for BARs that were never set via
set_bar()), the implementation will need to clear the adjacent BAR
(upper 32 bits) as well; having only_64bit set documents that
requirement.

Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
---
v2: New patch in v2

 include/linux/pci-epc.h | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index fb3f34829d2b..8ed000dbeca4 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -247,11 +247,6 @@ struct pci_epc_bar_rsvd_region {
  *		should be configured as 32-bit or 64-bit, the EPF driver must
  *		configure this BAR as 64-bit. Additionally, the BAR succeeding
  *		this BAR must be set to type BAR_64BIT_UPPER.
- *
- *		only_64bit should not be set on a BAR of type BAR_RESERVED.
- *		(If BARx is a 64-bit BAR that an EPF driver is not allowed to
- *		reprogram, then both BARx and BARx+1 must be set to type
- *		BAR_RESERVED.)
  * @nr_rsvd_regions: number of fixed subregions described for BAR_RESERVED
  * @rsvd_regions: fixed subregions behind BAR_RESERVED
  */
-- 
2.34.1


  parent reply	other threads:[~2026-03-03  7:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-03  7:19 [PATCH v2 0/5] PCI: endpoint: Add Tegra194/234 BAR layout and pci_endpoint_test support Manikanta Maddireddy
2026-03-03  7:20 ` [PATCH v2 1/5] PCI: endpoint: Add reserved region type for MSI-X Table and PBA Manikanta Maddireddy
2026-03-03 13:46   ` Niklas Cassel
2026-03-03  7:20 ` Manikanta Maddireddy [this message]
2026-03-03 13:46   ` [PATCH v2 2/5] PCI: endpoint: Allow only_64bit on BAR_RESERVED Niklas Cassel
2026-03-03  7:20 ` [PATCH v2 3/5] PCI: tegra194: Make BAR0 programmable and remove 1MB size limit Manikanta Maddireddy
2026-03-03 13:48   ` Niklas Cassel
2026-03-03  7:20 ` [PATCH v2 4/5] PCI: tegra194: Expose BAR2 (MSI-X) and BAR4 (DMA) as 64-bit BAR_RESERVED Manikanta Maddireddy
2026-03-03 13:51   ` Niklas Cassel
2026-03-03  7:20 ` [PATCH v2 5/5] misc: pci_endpoint_test: Add Tegra194 and Tegra234 device table entries Manikanta Maddireddy
2026-03-03 13:49   ` Niklas Cassel
2026-03-21 12:32 ` [PATCH v2 0/5] PCI: endpoint: Add Tegra194/234 BAR layout and pci_endpoint_test support Manivannan Sadhasivam

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