Commit 4db5e636 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'pci-v4.9-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci 

Pull PCI fixes from Bjorn Helgaas:
 "PCI fixes:

   - Fix Read Completion Boundary setting, which fixes a boot failure on
     IBM x3850 with Mellanox MT27500 ConnectX-3

   - Update some MAINTAINERS entries and email addresses"

* tag 'pci-v4.9-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Set Read Completion Boundary to 128 iff Root Port supports it (_HPX)
  PCI: Export pcie_find_root_port
  PCI: designware-plat: Update author email
  PCI: designware: Change maintainer to Joao Pinto
  MAINTAINERS: Add devicetree binding to PCI i.MX6 entry
  MAINTAINERS: Update Richard Zhu's email address
parents 2caceb32 e42010d8

MAINTAINERS

+4 −9
Original line number Diff line number Diff line
@@ -9257,11 +9257,12 @@ S: Maintained 
F:	drivers/pci/host/*layerscape*



PCI DRIVER FOR IMX6

M:	Richard Zhu <Richard.Zhu@freescale.com>

M:	Richard Zhu <hongxing.zhu@nxp.com>

M:	Lucas Stach <l.stach@pengutronix.de>

L:	linux-pci@vger.kernel.org

L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)

S:	Maintained

F:	Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt

F:	drivers/pci/host/*imx6*



PCI DRIVER FOR TI KEYSTONE
@@ -9320,17 +9321,11 @@ F: drivers/pci/host/pci-exynos.c 


PCI DRIVER FOR SYNOPSIS DESIGNWARE

M:	Jingoo Han <jingoohan1@gmail.com>

M:	Pratyush Anand <pratyush.anand@gmail.com>

L:	linux-pci@vger.kernel.org

S:	Maintained

F:	drivers/pci/host/*designware*



PCI DRIVER FOR SYNOPSYS PROTOTYPING DEVICE

M:	Jose Abreu <Jose.Abreu@synopsys.com>

M:	Joao Pinto <Joao.Pinto@synopsys.com>

L:	linux-pci@vger.kernel.org

S:	Maintained

F:	Documentation/devicetree/bindings/pci/designware-pcie.txt

F:	drivers/pci/host/pcie-designware-plat.c

F:	drivers/pci/host/*designware*



PCI DRIVER FOR GENERIC OF HOSTS

M:	Will Deacon <will.deacon@arm.com>

drivers/pci/host/pcie-designware-plat.c

+1 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
 *

 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)

 *

 * Authors: Joao Pinto <jpmpinto@gmail.com>

 * Authors: Joao Pinto <Joao.Pinto@synopsys.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

drivers/pci/pcie/aer/aer_inject.c

+0 −14
Original line number Diff line number Diff line
@@ -307,20 +307,6 @@ out: 
	return 0;

}



static struct pci_dev *pcie_find_root_port(struct pci_dev *dev)

{

	while (1) {

		if (!pci_is_pcie(dev))

			break;

		if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)

			return dev;

		if (!dev->bus->self)

			break;

		dev = dev->bus->self;

	}

	return NULL;

}



static int find_aer_device_iter(struct device *device, void *data)

{

	struct pcie_device **result = data;

drivers/pci/probe.c

+27 −1
Original line number Diff line number Diff line
@@ -1439,6 +1439,21 @@ static void program_hpp_type1(struct pci_dev *dev, struct hpp_type1 *hpp) 
		dev_warn(&dev->dev, "PCI-X settings not supported\n");

}



static bool pcie_root_rcb_set(struct pci_dev *dev)

{

	struct pci_dev *rp = pcie_find_root_port(dev);

	u16 lnkctl;



	if (!rp)

		return false;



	pcie_capability_read_word(rp, PCI_EXP_LNKCTL, &lnkctl);

	if (lnkctl & PCI_EXP_LNKCTL_RCB)

		return true;



	return false;

}



static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)

{

	int pos;
@@ -1468,9 +1483,20 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp) 
			~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);



	/* Initialize Link Control Register */

	if (pcie_cap_has_lnkctl(dev))

	if (pcie_cap_has_lnkctl(dev)) {



		/*

		 * If the Root Port supports Read Completion Boundary of

		 * 128, set RCB to 128.  Otherwise, clear it.

		 */

		hpp->pci_exp_lnkctl_and |= PCI_EXP_LNKCTL_RCB;

		hpp->pci_exp_lnkctl_or &= ~PCI_EXP_LNKCTL_RCB;

		if (pcie_root_rcb_set(dev))

			hpp->pci_exp_lnkctl_or |= PCI_EXP_LNKCTL_RCB;



		pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,

			~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);

	}



	/* Find Advanced Error Reporting Enhanced Capability */

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);

include/linux/pci.h

+14 −0
Original line number Diff line number Diff line
@@ -1928,6 +1928,20 @@ static inline int pci_pcie_type(const struct pci_dev *dev) 
	return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;

}



static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)

{

	while (1) {

		if (!pci_is_pcie(dev))

			break;

		if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)

			return dev;

		if (!dev->bus->self)

			break;

		dev = dev->bus->self;

	}

	return NULL;

}



void pci_request_acs(void);

bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);

bool pci_acs_path_enabled(struct pci_dev *start,

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