From: Vidya Sagar <vidyas@nvidia.com>
To: <jingoohan1@gmail.com>, <gustavo.pimentel@synopsys.com>,
<lorenzo.pieralisi@arm.com>, <bhelgaas@google.com>,
<amurray@thegoodpenguin.co.uk>, <robh@kernel.org>,
<treding@nvidia.com>, <jonathanh@nvidia.com>
Cc: <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<kthota@nvidia.com>, <mmaddireddy@nvidia.com>,
<vidyas@nvidia.com>, <sagar.tv@gmail.com>
Subject: [PATCH 1/3] PCI: of: Warn if non-prefetchable memory aperture size is > 32-bit
Date: Sat, 24 Oct 2020 01:26:53 +0530 [thread overview]
Message-ID: <20201023195655.11242-2-vidyas@nvidia.com> (raw)
In-Reply-To: <20201023195655.11242-1-vidyas@nvidia.com>
As per PCIe spec r5.0, sec 7.5.1.3.8 only 32-bit BAR registers are defined
for non-prefetchable memory and hence a warning should be reported when
the size of them go beyond 32-bits.
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
---
drivers/pci/of.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index ac24cd5439a9..5ea472ae22ac 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -556,6 +556,11 @@ static int pci_parse_request_of_pci_ranges(struct device *dev,
break;
case IORESOURCE_MEM:
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
+
+ if (!(res->flags & IORESOURCE_PREFETCH))
+ if (upper_32_bits(resource_size(res)))
+ dev_warn(dev, "Memory resource size exceeds max for 32 bits\n");
+
break;
}
}
--
2.17.1
next prev parent reply other threads:[~2020-10-23 19:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-23 19:56 [PATCH 0/3] Add support to handle prefetchable memory Vidya Sagar
2020-10-23 19:56 ` Vidya Sagar [this message]
2020-10-26 17:51 ` [PATCH 1/3] PCI: of: Warn if non-prefetchable memory aperture size is > 32-bit Rob Herring
2020-10-23 19:56 ` [PATCH 2/3] PCI: dwc: Add support to program ATU for >4GB memory aperture sizes Vidya Sagar
2020-10-26 17:51 ` Rob Herring
2020-10-23 19:56 ` [PATCH 3/3] PCI: dwc: Add support to handle prefetchable memory mapping Vidya Sagar
2020-10-26 15:40 ` Rob Herring
2020-10-24 4:03 ` [PATCH 0/3] Add support to handle prefetchable memory Jingoo Han
2020-10-26 12:32 ` Thierry Reding
2020-11-04 7:46 ` Vidya Sagar
2020-11-17 4:38 ` Vidya Sagar
2020-11-17 12:10 ` [PATCH 0/3] Add support to handle prefetchable memoryg Lorenzo Pieralisi
2020-11-17 17:34 ` Vidya Sagar
2020-11-18 10:29 ` [PATCH 0/3] Add support to handle prefetchable memory Lorenzo Pieralisi
2020-11-04 9:50 ` Jon Hunter
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