linux-kernel - [PATCH 1/1] MPC831x: fix PCI express probing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <1363684127-23926-1-git-send-email-Sergey.Gerasimov@astrosoft-development.com>
Date:	Tue, 19 Mar 2013 10:08:47 +0100
From:	Sergey Gerasimov <Sergey.Gerasimov@...rosoft-development.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Kumar Gala <galak@...nel.crashing.org>,
	Jia Hongtao <B38951@...escale.com>,
	Li Yang <leoli@...escale.com>,
	Roy Zang <tie-fei.zang@...escale.com>,
	Timur Tabi <timur@...escale.com>, linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org,
	Sergey Gerasimov <Sergey.Gerasimov@...rosoft-development.com>
Subject:  [PATCH 1/1] MPC831x: fix PCI express probing

For MPC831x the bus probing function also needs the fixup to assign
addresses to the PCI devices as it was for MPC85xx and MPC86xx.
The fixup of the bridge vendor and device ID should be done early in
PCI probing. Else the bridge is not detected as FIXUP_HEADER is called
too late.

Signed-off-by: Sergey Gerasimov <Sergey.Gerasimov@...rosoft-development.com>
---
 arch/powerpc/sysdev/fsl_pci.c | 67 +++++++++++++++++++------------------------
 1 file changed, 30 insertions(+), 37 deletions(-)

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 682084d..b4f0873 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -64,6 +64,34 @@ static int __init fsl_pcie_check_link(struct pci_controller *hose)
 	return 0;
 }
 
+void fsl_pcibios_fixup_bus(struct pci_bus *bus)
+{
+	struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
+	int i;
+
+
+	if ((bus->parent == hose->bus)
+		&& ((fsl_pcie_bus_fixup
+			&& pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP))
+				|| (hose->indirect_type
+					& PPC_INDIRECT_TYPE_NO_PCIE_LINK))) {
+		for (i = 0; i < 4; ++i) {
+			struct resource *res = bus->resource[i];
+			struct resource *par = bus->parent->resource[i];
+			if (res) {
+				res->start = 0;
+				res->end   = 0;
+				res->flags = 0;
+			}
+			if (res && par) {
+				res->start = par->start;
+				res->end   = par->end;
+				res->flags = par->flags;
+			}
+		}
+	}
+}
+
 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
 
 #define MAX_PHYS_ADDR_BITS	40
@@ -384,42 +412,6 @@ static void __init setup_pci_cmd(struct pci_controller *hose)
 	}
 }
 
-void fsl_pcibios_fixup_bus(struct pci_bus *bus)
-{
-	struct pci_controller *hose = pci_bus_to_host(bus);
-	int i, is_pcie = 0, no_link;
-
-	/* The root complex bridge comes up with bogus resources,
-	 * we copy the PHB ones in.
-	 *
-	 * With the current generic PCI code, the PHB bus no longer
-	 * has bus->resource[0..4] set, so things are a bit more
-	 * tricky.
-	 */
-
-	if (fsl_pcie_bus_fixup)
-		is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
-	no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
-
-	if (bus->parent == hose->bus && (is_pcie || no_link)) {
-		for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
-			struct resource *res = bus->resource[i];
-			struct resource *par;
-
-			if (!res)
-				continue;
-			if (i == 0)
-				par = &hose->io_resource;
-			else if (i < 4)
-				par = &hose->mem_resources[i-1];
-			else par = NULL;
-
-			res->start = par ? par->start : 0;
-			res->end   = par ? par->end   : 0;
-			res->flags = par ? par->flags : 0;
-		}
-	}
-}
 
 int __init fsl_add_bridge(struct platform_device *pdev, int is_primary)
 {
@@ -515,7 +507,8 @@ no_bridge:
 }
 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
 
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_pcie_header);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
+	quirk_fsl_pcie_header);
 
 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
 struct mpc83xx_pcie_priv {
-- 
1.7.11.7

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/