linux.git/drivers/pci/host, branch v4.4.177 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git PCI: altera: Move retrain from fixup to altera_pcie_host_init() 2019-01-16T21:16:11+00:00 Ley Foon Tan lftan@altera.com 2016-08-26T01:47:25+00:00 bb1de61e06c6eb0a602e0e86399af22476bc2289 commit ce4f1c7ad490aa7129bde5632d6e53943f8a866c upstream. Previously we used a PCI early fixup to initiate a link retrain on Altera devices. But Altera PCIe IP can be configured as either a Root Port or an Endpoint, and they might have same vendor ID, so the fixup would be run for both. We only want to initiate a link retrain for Altera Root Port devices, not for Endpoints, so move the link retrain functionality from the fixup to altera_pcie_host_init(). [bhelgaas: changelog] Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit ce4f1c7ad490aa7129bde5632d6e53943f8a866c upstream.

Previously we used a PCI early fixup to initiate a link retrain on Altera
devices.  But Altera PCIe IP can be configured as either a Root Port or an
Endpoint, and they might have same vendor ID, so the fixup would be run for
both.

We only want to initiate a link retrain for Altera Root Port devices, not
for Endpoints, so move the link retrain functionality from the fixup to
altera_pcie_host_init().

[bhelgaas: changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: altera: Rework config accessors for use without a struct pci_bus 2019-01-16T21:16:11+00:00 Ley Foon Tan lftan@altera.com 2016-08-26T01:47:24+00:00 2f5e06cf8ff289bb2b2cf278c1f78c5d63f4870a commit 31fc0ad47e2e0b8417616aa0f1ddcc67edf1e109 upstream. Rework configs accessors so a future patch can use them in _probe() with struct altera_pcie instead of struct pci_bus. Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 31fc0ad47e2e0b8417616aa0f1ddcc67edf1e109 upstream.

Rework configs accessors so a future patch can use them in _probe() with
struct altera_pcie instead of struct pci_bus.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: altera: Poll for link training status after retraining the link 2019-01-16T21:16:11+00:00 Ley Foon Tan lftan@altera.com 2016-08-15T06:06:02+00:00 db94a1ebabc4eb3791d20b8a3eccf2d29d1f77a4 commit 411dc32d8810e0a204c799ce5c97cb56990de1cb upstream. Poll for link training status is cleared before poll for link up status. This can help to get the reliable link up status, especially when PCIe is in Gen 3 speed. Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 411dc32d8810e0a204c799ce5c97cb56990de1cb upstream.

Poll for link training status is cleared before poll for link up status.
This can help to get the reliable link up status, especially when PCIe is
in Gen 3 speed.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: altera: Poll for link up status after retraining the link 2019-01-16T21:16:11+00:00 Ley Foon Tan lftan@altera.com 2016-06-21T08:53:13+00:00 704a120d8868cbe670830826b997c2ecdec32041 commit 3a928e98a833e1a470a60d2fedf3c55502185fb7 upstream. Some PCIe devices take a long time to reach link up state after retrain. Poll for link up status after retraining the link. This is to make sure the link is up before we access configuration space. [bhelgaas: changelog] Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 3a928e98a833e1a470a60d2fedf3c55502185fb7 upstream.

Some PCIe devices take a long time to reach link up state after retrain.
Poll for link up status after retraining the link.  This is to make sure
the link is up before we access configuration space.

[bhelgaas: changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: altera: Check link status before retrain link 2019-01-16T21:16:11+00:00 Ley Foon Tan lftan@altera.com 2016-06-21T08:53:12+00:00 cb3ff0382e582c823cbd2ba549b7754c6416ab78 commit c622032ebc538cb3869c312ae3ad235a99da84b6 upstream. Check the link status before retraining. If the link is not up, don't bother trying to retrain it. [bhelgaas: split code move to separate patch, changelog] Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit c622032ebc538cb3869c312ae3ad235a99da84b6 upstream.

Check the link status before retraining.  If the link is not up, don't
bother trying to retrain it.

[bhelgaas: split code move to separate patch, changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: altera: Reorder read/write functions 2019-01-16T21:16:11+00:00 Bjorn Helgaas bhelgaas@google.com 2016-07-22T20:54:41+00:00 9efffbc8191dd989065d4cf12e50d2abc84bd1fb commit f8be11ae3d2c9a1338da37ff91ff4c65922d21be upstream. Move cra_writel(), cra_readl(), and altera_pcie_link_is_up() so a future patch can use them in altera_pcie_retrain(). No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit f8be11ae3d2c9a1338da37ff91ff4c65922d21be upstream.

Move cra_writel(), cra_readl(), and altera_pcie_link_is_up() so a future
patch can use them in altera_pcie_retrain().  No functional change
intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: altera: Fix altera_pcie_link_is_up() 2019-01-16T21:16:11+00:00 Ley Foon Tan lftan@altera.com 2016-03-02T09:43:07+00:00 ecd77ebfa6ddcf728c8eccb4cdfebc23ab7125b9 commit eff31f4002c4e25b9b8c39d0a3a551c6c64c77e8 upstream. Originally altera_pcie_link_is_up() decided the link was up if any of the low four bits of the LTSSM register were set. But the link is only up if the LTSSM state is L0, so check for that exact value. [bhelgaas: changelog] Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Claudius Heine <claudius.heine.ext@siemens.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit eff31f4002c4e25b9b8c39d0a3a551c6c64c77e8 upstream.

Originally altera_pcie_link_is_up() decided the link was up if any of the
low four bits of the LTSSM register were set.  But the link is only up if
the LTSSM state is L0, so check for that exact value.

[bhelgaas: changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: mvebu: Fix I/O space end address calculation 2018-09-15T07:40:39+00:00 Thomas Petazzoni thomas.petazzoni@bootlin.com 2018-08-03T14:38:44+00:00 d07bbe50d1b7e98fb1afeed62506c28dd1a21700 [ Upstream commit dfd0309fd7b30a5baffaf47b2fccb88b46d64d69 ] pcie->realio.end should be the address of last byte of the area, therefore using resource_size() of another resource is not correct, we must substract 1 to get the address of the last byte. Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout") Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit dfd0309fd7b30a5baffaf47b2fccb88b46d64d69 ]

pcie->realio.end should be the address of last byte of the area,
therefore using resource_size() of another resource is not correct, we
must substract 1 to get the address of the last byte.

Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: keystone: Fix interrupt-controller-node lookup 2018-02-28T09:17:21+00:00 Johan Hovold johan@kernel.org 2017-11-17T13:38:31+00:00 7de85e493a1f6b6b5f8eea409564b55137755c98 commit eac56aa3bc8af3d9b9850345d0f2da9d83529134 upstream. Fix child-node lookup during initialisation which was using the wrong OF-helper and ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children. To make things worse, the parent pci node could end up being prematurely freed as of_find_node_by_name() drops a reference to its first argument. Any matching child interrupt-controller node was also leaked. Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver") Cc: stable <stable@vger.kernel.org> # 3.18 Acked-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Johan Hovold <johan@kernel.org> [lorenzo.pieralisi@arm.com: updated commit subject] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> [johan: backport to 4.4] Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit eac56aa3bc8af3d9b9850345d0f2da9d83529134 upstream.

Fix child-node lookup during initialisation which was using the wrong
OF-helper and ended up searching the whole device tree depth-first
starting at the parent rather than just matching on its children.

To make things worse, the parent pci node could end up being prematurely
freed as of_find_node_by_name() drops a reference to its first argument.
Any matching child interrupt-controller node was also leaked.

Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver")
Cc: stable <stable@vger.kernel.org>     # 3.18
Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
[lorenzo.pieralisi@arm.com: updated commit subject]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
[johan: backport to 4.4]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
PCI: layerscape: Fix MSG TLP drop setting 2018-01-31T11:06:08+00:00 Minghuan Lian Minghuan.Lian@nxp.com 2016-02-29T23:24:15+00:00 5ee8fef15d0affce9ff482dd99ff33a0578c2368 commit 1195c103f6c98d9ff381cac3a8760d4f8a133627 upstream. Some kinds of Layerscape PCIe controllers will forward the received message TLPs to system application address space, which could corrupt system memory or lead to a system hang. Enable MSG_DROP to fix this issue. Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 1195c103f6c98d9ff381cac3a8760d4f8a133627 upstream.

Some kinds of Layerscape PCIe controllers will forward the received message
TLPs to system application address space, which could corrupt system memory
or lead to a system hang.  Enable MSG_DROP to fix this issue.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>