linux-kernel - [PATCH 5.5 091/367] PCI: keystone: Fix outbound region mapping

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Date:   Mon, 10 Feb 2020 04:30:04 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yurii Monakov <monakov.y@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <andrew.murray@....com>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 5.5 091/367] PCI: keystone: Fix outbound region mapping

From: Yurii Monakov <monakov.y@...il.com>

commit 2d0c3fbe43fa0e6fcb7a6c755c5f4cd702c0d2f4 upstream.

The Keystone outbound Address Translation Unit (ATU) maps PCI MMIO space in
8 MB windows.  When programming the ATU windows, we previously incremented
the starting address by 8, not 8 MB, so all the windows were mapped to the
first 8 MB.  Therefore, only 8 MB of MMIO space was accessible.

Update the loop so it increments the starting address by 8 MB, not 8, so
more MMIO space is accessible.

Fixes: e75043ad9792 ("PCI: keystone: Cleanup outbound window configuration")
Link: https://lore.kernel.org/r/20191004154811.GA31397@monakov-y.office.kontur-niirs.ru
Signed-off-by: Yurii Monakov <monakov.y@...il.com>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Acked-by: Andrew Murray <andrew.murray@....com>
Acked-by: Kishon Vijay Abraham I <kishon@...com>
Cc: stable@...r.kernel.org	# v4.20+
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pci/controller/dwc/pci-keystone.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -422,7 +422,7 @@ static void ks_pcie_setup_rc_app_regs(st
 				   lower_32_bits(start) | OB_ENABLEN);
 		ks_pcie_app_writel(ks_pcie, OB_OFFSET_HI(i),
 				   upper_32_bits(start));
-		start += OB_WIN_SIZE;
+		start += OB_WIN_SIZE * SZ_1M;
 	}
 
 	val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);