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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 2/4] PCI: tegra194: Make BAR0 programmable and remove 1MB size limit
Date: Mon, 23 Feb 2026 01:04:54 +0530	[thread overview]
Message-ID: <20260222193456.2460963-3-mmaddireddy@nvidia.com> (raw)
In-Reply-To: <20260222193456.2460963-1-mmaddireddy@nvidia.com>

BAR0 is capable of supporting various sizes via DBI2 BAR registers
programmed in dw_pcie_ep_set_bar_programmable(). Remove the 1MB fixed
size from pci_epc_features and set the BAR type to BAR_PROGRAMMABLE.

Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 4a3b50322204..3c84a230dc79 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -2000,11 +2000,11 @@ static int tegra_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
 	return 0;
 }
 
+/* Tegra EP: BAR0 = 64-bit programmable BAR */
 static const struct pci_epc_features tegra_pcie_epc_features = {
 	.linkup_notifier = true,
 	.msi_capable = true,
-	.bar[BAR_0] = { .type = BAR_FIXED, .fixed_size = SZ_1M,
-			.only_64bit = true, },
+	.bar[BAR_0] = { .type = BAR_PROGRAMMABLE, .only_64bit = true, },
 	.bar[BAR_1] = { .type = BAR_64BIT_UPPER, },
 	.bar[BAR_2] = { .type = BAR_DISABLED, },
 	.bar[BAR_3] = { .type = BAR_DISABLED, },
-- 
2.34.1


  parent reply	other threads:[~2026-02-22 19:35 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-22 19:34 [PATCH 0/4] PCI: endpoint: Add Tegra194/234 BAR layout and pci_endpoint_test support Manikanta Maddireddy
2026-02-22 19:34 ` [PATCH 1/4] PCI: endpoint: Add reserved region type for MSI-X Table and PBA Manikanta Maddireddy
2026-02-25 17:21   ` Niklas Cassel
2026-02-22 19:34 ` Manikanta Maddireddy [this message]
2026-02-25 17:31   ` [PATCH 2/4] PCI: tegra194: Make BAR0 programmable and remove 1MB size limit Niklas Cassel
2026-03-03  7:19     ` Manikanta Maddireddy
2026-02-22 19:34 ` [PATCH 3/4] PCI: tegra194: Expose BAR2 (MSI-X) and BAR4 (DMA) as 64-bit BAR_RESERVED Manikanta Maddireddy
2026-02-25 17:51   ` Niklas Cassel
2026-02-22 19:34 ` [PATCH 4/4] misc: pci_endpoint_test: Add Tegra194 and Tegra234 device table entries Manikanta Maddireddy
2026-02-25 17:58   ` Niklas Cassel
2026-02-25 18:16     ` Niklas Cassel

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