[PATCH v2 00/16] PCI: dwc: Another round of clean-ups

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* [PATCH v2 00/16] PCI: dwc: Another round of clean-ups
@ 2020-11-05 21:11 ` Rob Herring
  2020-11-05 21:11   ` [PATCH v2 08/16] PCI: dwc: Move MSI interrupt setup into DWC common code Rob Herring
                     ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
  To: Lorenzo Pieralisi
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, linux-tegra, Thierry Reding, linux-arm-kernel,
	Thomas Petazzoni, Jonathan Chocron, Shawn Guo, Jonathan Hunter,
	Fabio Estevam, Jerome Brunet, Jesper Nilsson, linux-samsung-soc,
	Minghuan Lian, Kevin Hilman, Pratyush Anand, Krzysztof Kozlowski,
	Kishon Vijay Abraham I, Kukjin Kim, Mingkai Hu, Xiaowei Song,
	Marek Szyprowski, NXP Linux Team, Richard Zhu,
	Martin Blumenstingl, linux-arm-msm, Sascha Hauer, Yue Wang,
	Murali Karicheri, Bjorn Helgaas, linux-amlogic, linux-omap,
	linux-arm-kernel, Roy Zang, Masahiro Yamada, Jingoo Han,
	Andy Gross, Vidya Sagar, Stanimir Varbanov,
	Pengutronix Kernel Team, Gustavo Pimentel, linuxppc-dev,
	Lucas Stach

Here's another batch of DWC PCI host refactoring. This series primarily
moves more of the MSI, link up, and resource handling to the core
code. Beyond a couple of minor fixes, new in this version is runtime
detection of iATU regions instead of using DT properties.

No doubt I've probably broken something. Please test. I've run this thru
kernelci and checked boards with DWC PCI which currently is just
Layerscape boards (hint: add boards and/or enable PCI). A git branch is
here[1].

This is dependent on "PCI: dwc: Restore ATU memory resource setup to use
last entry" which will be in v5.10-rc3.

Rob

[1] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git pci-more-dwc-cleanup

Rob Herring (16):
  PCI: dwc: Support multiple ATU memory regions
  PCI: dwc/intel-gw: Move ATU offset out of driver match data
  PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into
    common code
  PCI: dwc/intel-gw: Remove some unneeded function wrappers
  PCI: dwc: Ensure all outbound ATU windows are reset
  PCI: dwc/dra7xx: Use the common MSI irq_chip
  PCI: dwc: Drop the .set_num_vectors() host op
  PCI: dwc: Move MSI interrupt setup into DWC common code
  PCI: dwc: Rework MSI initialization
  PCI: dwc: Move link handling into common code
  PCI: dwc: Move dw_pcie_msi_init() into core
  PCI: dwc: Move dw_pcie_setup_rc() to DWC common code
  PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init()
  Revert "PCI: dwc/keystone: Drop duplicated 'num-viewport'"
  PCI: dwc: Move inbound and outbound windows to common struct
  PCI: dwc: Detect number of iATU windows

 drivers/pci/controller/dwc/pci-dra7xx.c       | 141 +-----------------
 drivers/pci/controller/dwc/pci-exynos.c       |  50 ++-----
 drivers/pci/controller/dwc/pci-imx6.c         |  39 +----
 drivers/pci/controller/dwc/pci-keystone.c     |  79 ++--------
 .../pci/controller/dwc/pci-layerscape-ep.c    |  37 +----
 drivers/pci/controller/dwc/pci-layerscape.c   |  67 +--------
 drivers/pci/controller/dwc/pci-meson.c        |  53 ++-----
 drivers/pci/controller/dwc/pcie-al.c          |  29 +---
 drivers/pci/controller/dwc/pcie-armada8k.c    |  37 ++---
 drivers/pci/controller/dwc/pcie-artpec6.c     |  76 +---------
 .../pci/controller/dwc/pcie-designware-ep.c   |  58 +++----
 .../pci/controller/dwc/pcie-designware-host.c | 139 ++++++++++-------
 .../pci/controller/dwc/pcie-designware-plat.c |  70 +--------
 drivers/pci/controller/dwc/pcie-designware.c  |  93 +++++++++++-
 drivers/pci/controller/dwc/pcie-designware.h  |  24 +--
 drivers/pci/controller/dwc/pcie-histb.c       |  37 ++---
 drivers/pci/controller/dwc/pcie-intel-gw.c    |  67 ++-------
 drivers/pci/controller/dwc/pcie-kirin.c       |  62 +-------
 drivers/pci/controller/dwc/pcie-qcom.c        |  38 +----
 drivers/pci/controller/dwc/pcie-spear13xx.c   |  62 +++-----
 drivers/pci/controller/dwc/pcie-tegra194.c    |  41 +----
 drivers/pci/controller/dwc/pcie-uniphier-ep.c |  38 +----
 drivers/pci/controller/dwc/pcie-uniphier.c    |  51 +------
 23 files changed, 356 insertions(+), 1032 deletions(-)

--
2.25.1

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^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 08/16] PCI: dwc: Move MSI interrupt setup into DWC common code
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
@ 2020-11-05 21:11   ` Rob Herring
  2020-11-05 21:11   ` [PATCH v2 10/16] PCI: dwc: Move link handling into " Rob Herring
                     ` (5 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, Masahiro Yamada, Thierry Reding,
	linux-arm-kernel, Fabio Estevam, Jerome Brunet, Jesper Nilsson,
	Lorenzo Pieralisi, Kevin Hilman, Pratyush Anand, linux-tegra,
	Krzysztof Kozlowski, Jonathan Hunter, Kukjin Kim, NXP Linux Team,
	Xiaowei Song, Richard Zhu, Martin Blumenstingl, linux-arm-msm,
	Sascha Hauer, Yue Wang, linux-samsung-soc, Bjorn Helgaas,
	linux-amlogic, linux-arm-kernel, Gustavo Pimentel, Andy Gross,
	Stanimir Varbanov, Pengutronix Kernel Team, Jingoo Han, Shawn Guo,
	Lucas Stach

Platforms using the built-in DWC MSI controller all have a dedicated
interrupt with "msi" name or at index 0, so let's move setting up the
interrupt to the common DWC code.

spear13xx and dra7xx are the 2 oddballs with muxed interrupts, so
we need to prevent configuring the MSI interrupt by setting msi_irq
to negative.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Yue Wang <yue.wang@Amlogic.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Xiaowei Song <songxiaowei@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@axis.com
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
 - Make get_irq optional to avoid error message
---
 drivers/pci/controller/dwc/pci-dra7xx.c       |  3 +++
 drivers/pci/controller/dwc/pci-exynos.c       |  6 -----
 drivers/pci/controller/dwc/pci-imx6.c         |  6 -----
 drivers/pci/controller/dwc/pci-meson.c        |  6 -----
 drivers/pci/controller/dwc/pcie-artpec6.c     |  6 -----
 .../pci/controller/dwc/pcie-designware-host.c | 11 +++++++++-
 .../pci/controller/dwc/pcie-designware-plat.c |  6 -----
 drivers/pci/controller/dwc/pcie-histb.c       |  6 -----
 drivers/pci/controller/dwc/pcie-kirin.c       | 22 -------------------
 drivers/pci/controller/dwc/pcie-qcom.c        |  8 -------
 drivers/pci/controller/dwc/pcie-spear13xx.c   |  1 +
 drivers/pci/controller/dwc/pcie-tegra194.c    |  8 -------
 drivers/pci/controller/dwc/pcie-uniphier.c    |  6 -----
 13 files changed, 14 insertions(+), 81 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 4d0c35a4aa59..6b75c68dddb5 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -489,6 +489,9 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
 	if (pp->irq < 0)
 		return pp->irq;
 
+	/* MSI IRQ is muxed */
+	pp->msi_irq = -ENODEV;
+
 	ret = dra7xx_pcie_init_irq_domain(pp);
 	if (ret < 0)
 		return ret;
diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index 242683cde04a..7734394953e5 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -415,12 +415,6 @@ static int __init exynos_add_pcie_port(struct exynos_pcie *ep,
 		return ret;
 	}
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq(pdev, 0);
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	pp->ops = &exynos_pcie_host_ops;
 
 	ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 5cf1ef12fb9b..95e7cf06863d 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -853,12 +853,6 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	pp->ops = &imx6_pcie_host_ops;
 
 	ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index 1913dc2c8fa0..10d65b3093e4 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -405,12 +405,6 @@ static int meson_add_pcie_port(struct meson_pcie *mp,
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq(pdev, 0);
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	pp->ops = &meson_pcie_host_ops;
 
 	ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 52ad7909cd0c..a5239a58cee0 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -348,12 +348,6 @@ static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
 	struct device *dev = pci->dev;
 	int ret;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	pp->ops = &artpec6_pcie_host_ops;
 
 	ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 1bd6a9762426..95deef0eaadf 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -373,13 +373,22 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		}
 
 		if (!pp->ops->msi_host_init) {
+			if (!pp->msi_irq) {
+				pp->msi_irq = platform_get_irq_byname_optional(pdev, "msi");
+				if (pp->msi_irq < 0) {
+					pp->msi_irq = platform_get_irq(pdev, 0);
+					if (pp->msi_irq < 0)
+						return pp->msi_irq;
+				}
+			}
+
 			pp->msi_irq_chip = &dw_pci_msi_bottom_irq_chip;
 
 			ret = dw_pcie_allocate_domains(pp);
 			if (ret)
 				return ret;
 
-			if (pp->msi_irq)
+			if (pp->msi_irq > 0)
 				irq_set_chained_handler_and_data(pp->msi_irq,
 							    dw_chained_msi_isr,
 							    pp);
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index 13fede1d4157..3da38ac6a87a 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -116,12 +116,6 @@ static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
 	if (pp->irq < 0)
 		return pp->irq;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq(pdev, 0);
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	pp->num_vectors = MAX_MSI_IRQS;
 	pp->ops = &dw_plat_pcie_host_ops;
 
diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c
index afc1abbe49aa..777e24902afb 100644
--- a/drivers/pci/controller/dwc/pcie-histb.c
+++ b/drivers/pci/controller/dwc/pcie-histb.c
@@ -400,12 +400,6 @@ static int histb_pcie_probe(struct platform_device *pdev)
 		return PTR_ERR(hipcie->bus_reset);
 	}
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	hipcie->phy = devm_phy_get(dev, "phy");
 	if (IS_ERR(hipcie->phy)) {
 		dev_info(dev, "no pcie-phy found\n");
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 3042a23cf09a..ba03dbca7885 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -439,31 +439,9 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
 	.host_init = kirin_pcie_host_init,
 };
 
-static int kirin_pcie_add_msi(struct dw_pcie *pci,
-				struct platform_device *pdev)
-{
-	int irq;
-
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		irq = platform_get_irq(pdev, 0);
-		if (irq < 0)
-			return irq;
-
-		pci->pp.msi_irq = irq;
-	}
-
-	return 0;
-}
-
 static int kirin_add_pcie_port(struct dw_pcie *pci,
 			       struct platform_device *pdev)
 {
-	int ret;
-
-	ret = kirin_pcie_add_msi(pci, pdev);
-	if (ret)
-		return ret;
-
 	pci->pp.ops = &kirin_pcie_host_ops;
 
 	return dw_pcie_host_init(&pci->pp);
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 3b4f70b9f3f0..7ac08f0cae17 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1424,14 +1424,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 
 	pp->ops = &qcom_pcie_dw_ops;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
-		if (pp->msi_irq < 0) {
-			ret = pp->msi_irq;
-			goto err_pm_runtime_put;
-		}
-	}
-
 	ret = phy_init(pcie->phy);
 	if (ret) {
 		pm_runtime_disable(&pdev->dev);
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index 1ed7e3501ff1..800c34a60a33 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -185,6 +185,7 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
 	}
 
 	pp->ops = &spear13xx_pcie_host_ops;
+	pp->msi_irq = -ENODEV;
 
 	ret = dw_pcie_host_init(pp);
 	if (ret) {
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 5e2841f58700..77fc3ba3dec1 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1554,14 +1554,6 @@ static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie)
 	char *name;
 	int ret;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = of_irq_get_byname(dev->of_node, "msi");
-		if (!pp->msi_irq) {
-			dev_err(dev, "Failed to get MSI interrupt\n");
-			return -ENODEV;
-		}
-	}
-
 	pm_runtime_enable(dev);
 
 	ret = pm_runtime_get_sync(dev);
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index 33130fb4af90..6198bd106b8a 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -341,12 +341,6 @@ static int uniphier_add_pcie_port(struct uniphier_pcie_priv *priv,
 
 	pp->ops = &uniphier_pcie_host_ops;
 
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
-		if (pp->msi_irq < 0)
-			return pp->msi_irq;
-	}
-
 	ret = dw_pcie_host_init(pp);
 	if (ret) {
 		dev_err(dev, "Failed to initialize host (%d)\n", ret);
-- 
2.25.1


_______________________________________________
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^ permalink raw reply related	[flat|nested] 8+ messages in thread

* [PATCH v2 10/16] PCI: dwc: Move link handling into common code
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
  2020-11-05 21:11   ` [PATCH v2 08/16] PCI: dwc: Move MSI interrupt setup into DWC common code Rob Herring
@ 2020-11-05 21:11   ` Rob Herring
  2020-11-05 21:11   ` [PATCH v2 11/16] PCI: dwc: Move dw_pcie_msi_init() into core Rob Herring
                     ` (4 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, Masahiro Yamada, Thierry Reding,
	linux-arm-kernel, Thomas Petazzoni, Jonathan Hunter,
	Fabio Estevam, Jerome Brunet, Jesper Nilsson, Lorenzo Pieralisi,
	Kevin Hilman, Pratyush Anand, linux-tegra, Krzysztof Kozlowski,
	Kishon Vijay Abraham I, Murali Karicheri, NXP Linux Team,
	Xiaowei Song, Richard Zhu, Martin Blumenstingl, linux-arm-msm,
	Sascha Hauer, Yue Wang, linux-samsung-soc, Bjorn Helgaas,
	linux-amlogic, linux-omap, linux-arm-kernel, Gustavo Pimentel,
	Andy Gross, Stanimir Varbanov, Kukjin Kim,
	Pengutronix Kernel Team, Jingoo Han, Shawn Guo, Lucas Stach

All the DWC drivers do link setup and checks at roughly the same time.
Let's use the existing .start_link() hook (currently only used in EP
mode) and move the link handling to the core code.

The behavior for a link down was inconsistent as some drivers would fail
probe in that case while others succeed. Let's standardize this to
succeed as there are usecases where devices (and the link) appear later
even without hotplug. For example, a reconfigured FPGA device.

Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Yue Wang <yue.wang@Amlogic.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Xiaowei Song <songxiaowei@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-omap@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@axis.com
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/pci/controller/dwc/pci-dra7xx.c       |  2 -
 drivers/pci/controller/dwc/pci-exynos.c       | 41 +++++++----------
 drivers/pci/controller/dwc/pci-imx6.c         |  9 ++--
 drivers/pci/controller/dwc/pci-keystone.c     |  9 ----
 drivers/pci/controller/dwc/pci-meson.c        | 24 ++++------
 drivers/pci/controller/dwc/pcie-armada8k.c    | 39 +++++++---------
 drivers/pci/controller/dwc/pcie-artpec6.c     |  2 -
 .../pci/controller/dwc/pcie-designware-host.c |  9 ++++
 .../pci/controller/dwc/pcie-designware-plat.c |  3 --
 drivers/pci/controller/dwc/pcie-histb.c       | 34 +++++++-------
 drivers/pci/controller/dwc/pcie-kirin.c       | 23 ++--------
 drivers/pci/controller/dwc/pcie-qcom.c        | 19 ++------
 drivers/pci/controller/dwc/pcie-spear13xx.c   | 46 ++++++++-----------
 drivers/pci/controller/dwc/pcie-tegra194.c    |  1 -
 drivers/pci/controller/dwc/pcie-uniphier.c    | 13 ++----
 15 files changed, 103 insertions(+), 171 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 6b75c68dddb5..054423d9646d 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -183,8 +183,6 @@ static int dra7xx_pcie_host_init(struct pcie_port *pp)
 
 	dw_pcie_setup_rc(pp);
 
-	dra7xx_pcie_establish_link(pci);
-	dw_pcie_wait_for_link(pci);
 	dw_pcie_msi_init(pp);
 	dra7xx_pcie_enable_interrupts(dra7xx);
 
diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index 7734394953e5..6498b615c834 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -229,30 +229,9 @@ static void exynos_pcie_assert_reset(struct exynos_pcie *ep)
 				GPIOF_OUT_INIT_HIGH, "RESET");
 }
 
-static int exynos_pcie_establish_link(struct exynos_pcie *ep)
+static int exynos_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = ep->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = pci->dev;
-
-	if (dw_pcie_link_up(pci)) {
-		dev_err(dev, "Link already up\n");
-		return 0;
-	}
-
-	exynos_pcie_assert_core_reset(ep);
-
-	phy_reset(ep->phy);
-
-	exynos_pcie_writel(ep->mem_res->elbi_base, 1,
-			PCIE_PWR_RESET);
-
-	phy_power_on(ep->phy);
-	phy_init(ep->phy);
-
-	exynos_pcie_deassert_core_reset(ep);
-	dw_pcie_setup_rc(pp);
-	exynos_pcie_assert_reset(ep);
+	struct exynos_pcie *ep = to_exynos_pcie(pci);
 
 	/* assert LTSSM enable */
 	exynos_pcie_writel(ep->mem_res->elbi_base, PCIE_ELBI_LTSSM_ENABLE,
@@ -386,7 +365,20 @@ static int exynos_pcie_host_init(struct pcie_port *pp)
 
 	pp->bridge->ops = &exynos_pci_ops;
 
-	exynos_pcie_establish_link(ep);
+	exynos_pcie_assert_core_reset(ep);
+
+	phy_reset(ep->phy);
+
+	exynos_pcie_writel(ep->mem_res->elbi_base, 1,
+			PCIE_PWR_RESET);
+
+	phy_power_on(ep->phy);
+	phy_init(ep->phy);
+
+	exynos_pcie_deassert_core_reset(ep);
+	dw_pcie_setup_rc(pp);
+	exynos_pcie_assert_reset(ep);
+
 	exynos_pcie_enable_interrupts(ep);
 
 	return 0;
@@ -430,6 +422,7 @@ static const struct dw_pcie_ops dw_pcie_ops = {
 	.read_dbi = exynos_pcie_read_dbi,
 	.write_dbi = exynos_pcie_write_dbi,
 	.link_up = exynos_pcie_link_up,
+	.start_link = exynos_pcie_start_link,
 };
 
 static int __init exynos_pcie_probe(struct platform_device *pdev)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 95e7cf06863d..1fe8f3f2c380 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -745,9 +745,9 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
 	}
 }
 
-static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
+static int imx6_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = imx6_pcie->pci;
+	struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci);
 	struct device *dev = pci->dev;
 	u8 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
 	u32 tmp;
@@ -835,7 +835,6 @@ static int imx6_pcie_host_init(struct pcie_port *pp)
 	imx6_pcie_deassert_core_reset(imx6_pcie);
 	imx6_setup_phy_mpll(imx6_pcie);
 	dw_pcie_setup_rc(pp);
-	imx6_pcie_establish_link(imx6_pcie);
 	dw_pcie_msi_init(pp);
 
 	return 0;
@@ -865,7 +864,7 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
 }
 
 static const struct dw_pcie_ops dw_pcie_ops = {
-	/* No special ops needed, but pcie-designware still expects this struct */
+	.start_link = imx6_pcie_start_link,
 };
 
 #ifdef CONFIG_PM_SLEEP
@@ -974,7 +973,7 @@ static int imx6_pcie_resume_noirq(struct device *dev)
 	imx6_pcie_deassert_core_reset(imx6_pcie);
 	dw_pcie_setup_rc(pp);
 
-	ret = imx6_pcie_establish_link(imx6_pcie);
+	ret = imx6_pcie_start_link(imx6_pcie->pci);
 	if (ret < 0)
 		dev_info(dev, "pcie link is down after resume.\n");
 
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 784385ae6074..90b222b020a3 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -511,14 +511,8 @@ static void ks_pcie_stop_link(struct dw_pcie *pci)
 static int ks_pcie_start_link(struct dw_pcie *pci)
 {
 	struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
-	struct device *dev = pci->dev;
 	u32 val;
 
-	if (dw_pcie_link_up(pci)) {
-		dev_dbg(dev, "link is already up\n");
-		return 0;
-	}
-
 	/* Initiate Link Training */
 	val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
 	ks_pcie_app_writel(ks_pcie, CMD_STATUS, LTSSM_EN_VAL | val);
@@ -833,9 +827,6 @@ static int __init ks_pcie_host_init(struct pcie_port *pp)
 			"Asynchronous external abort");
 #endif
 
-	ks_pcie_start_link(pci);
-	dw_pcie_wait_for_link(pci);
-
 	return 0;
 }
 
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index 10d65b3093e4..41a3351b100b 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -231,7 +231,7 @@ static void meson_pcie_assert_reset(struct meson_pcie *mp)
 	gpiod_set_value_cansleep(mp->reset_gpio, 0);
 }
 
-static void meson_pcie_init_dw(struct meson_pcie *mp)
+static void meson_pcie_ltssm_enable(struct meson_pcie *mp)
 {
 	u32 val;
 
@@ -289,20 +289,14 @@ static void meson_set_max_rd_req_size(struct meson_pcie *mp, int size)
 	dw_pcie_writel_dbi(pci, offset + PCI_EXP_DEVCTL, val);
 }
 
-static int meson_pcie_establish_link(struct meson_pcie *mp)
+static int meson_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = &mp->pci;
-	struct pcie_port *pp = &pci->pp;
-
-	meson_pcie_init_dw(mp);
-	meson_set_max_payload(mp, MAX_PAYLOAD_SIZE);
-	meson_set_max_rd_req_size(mp, MAX_READ_REQ_SIZE);
-
-	dw_pcie_setup_rc(pp);
+	struct meson_pcie *mp = to_meson_pcie(pci);
 
+	meson_pcie_ltssm_enable(mp);
 	meson_pcie_assert_reset(mp);
 
-	return dw_pcie_wait_for_link(pci);
+	return 0;
 }
 
 static int meson_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn,
@@ -380,14 +374,13 @@ static int meson_pcie_host_init(struct pcie_port *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct meson_pcie *mp = to_meson_pcie(pci);
-	int ret;
 
 	pp->bridge->ops = &meson_pci_ops;
 
-	ret = meson_pcie_establish_link(mp);
-	if (ret)
-		return ret;
+	meson_set_max_payload(mp, MAX_PAYLOAD_SIZE);
+	meson_set_max_rd_req_size(mp, MAX_READ_REQ_SIZE);
 
+	dw_pcie_setup_rc(pp);
 	dw_pcie_msi_init(pp);
 
 	return 0;
@@ -418,6 +411,7 @@ static int meson_add_pcie_port(struct meson_pcie *mp,
 
 static const struct dw_pcie_ops dw_pcie_ops = {
 	.link_up = meson_pcie_link_up,
+	.start_link = meson_pcie_start_link,
 };
 
 static int meson_pcie_probe(struct platform_device *pdev)
diff --git a/drivers/pci/controller/dwc/pcie-armada8k.c b/drivers/pci/controller/dwc/pcie-armada8k.c
index 13901f359a41..dd2926bbb901 100644
--- a/drivers/pci/controller/dwc/pcie-armada8k.c
+++ b/drivers/pci/controller/dwc/pcie-armada8k.c
@@ -154,10 +154,24 @@ static int armada8k_pcie_link_up(struct dw_pcie *pci)
 	return 0;
 }
 
-static void armada8k_pcie_establish_link(struct armada8k_pcie *pcie)
+static int armada8k_pcie_start_link(struct dw_pcie *pci)
+{
+	u32 reg;
+
+	/* Start LTSSM */
+	reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_CONTROL_REG);
+	reg |= PCIE_APP_LTSSM_EN;
+	dw_pcie_writel_dbi(pci, PCIE_GLOBAL_CONTROL_REG, reg);
+
+	return 0;
+}
+
+static int armada8k_pcie_host_init(struct pcie_port *pp)
 {
-	struct dw_pcie *pci = pcie->pci;
 	u32 reg;
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+	dw_pcie_setup_rc(pp);
 
 	if (!dw_pcie_link_up(pci)) {
 		/* Disable LTSSM state machine to enable configuration */
@@ -193,26 +207,6 @@ static void armada8k_pcie_establish_link(struct armada8k_pcie *pcie)
 	       PCIE_INT_C_ASSERT_MASK | PCIE_INT_D_ASSERT_MASK;
 	dw_pcie_writel_dbi(pci, PCIE_GLOBAL_INT_MASK1_REG, reg);
 
-	if (!dw_pcie_link_up(pci)) {
-		/* Configuration done. Start LTSSM */
-		reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_CONTROL_REG);
-		reg |= PCIE_APP_LTSSM_EN;
-		dw_pcie_writel_dbi(pci, PCIE_GLOBAL_CONTROL_REG, reg);
-	}
-
-	/* Wait until the link becomes active again */
-	if (dw_pcie_wait_for_link(pci))
-		dev_err(pci->dev, "Link not up after reconfiguration\n");
-}
-
-static int armada8k_pcie_host_init(struct pcie_port *pp)
-{
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-	struct armada8k_pcie *pcie = to_armada8k_pcie(pci);
-
-	dw_pcie_setup_rc(pp);
-	armada8k_pcie_establish_link(pcie);
-
 	return 0;
 }
 
@@ -269,6 +263,7 @@ static int armada8k_add_pcie_port(struct armada8k_pcie *pcie,
 
 static const struct dw_pcie_ops dw_pcie_ops = {
 	.link_up = armada8k_pcie_link_up,
+	.start_link = armada8k_pcie_start_link,
 };
 
 static int armada8k_pcie_probe(struct platform_device *pdev)
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index a5239a58cee0..8b3da3038ac3 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -329,8 +329,6 @@ static int artpec6_pcie_host_init(struct pcie_port *pp)
 	artpec6_pcie_deassert_core_reset(artpec6_pcie);
 	artpec6_pcie_wait_for_phy(artpec6_pcie);
 	dw_pcie_setup_rc(pp);
-	artpec6_pcie_establish_link(pci);
-	dw_pcie_wait_for_link(pci);
 	dw_pcie_msi_init(pp);
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 9b952639d020..800e7a0415cf 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -423,6 +423,15 @@ int dw_pcie_host_init(struct pcie_port *pp)
 			goto err_free_msi;
 	}
 
+	if (!dw_pcie_link_up(pci) && pci->ops->start_link) {
+		ret = pci->ops->start_link(pci);
+		if (ret)
+			goto err_free_msi;
+	}
+
+	/* Ignore errors, the link may come up later */
+	dw_pcie_wait_for_link(pci);
+
 	bridge->sysdata = pp;
 
 	ret = pci_host_probe(bridge);
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index 3da38ac6a87a..adebcaeb1a6c 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -35,10 +35,7 @@ static const struct of_device_id dw_plat_pcie_of_match[];
 
 static int dw_plat_pcie_host_init(struct pcie_port *pp)
 {
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
 	dw_pcie_setup_rc(pp);
-	dw_pcie_wait_for_link(pci);
 	dw_pcie_msi_init(pp);
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c
index 777e24902afb..ece544165059 100644
--- a/drivers/pci/controller/dwc/pcie-histb.c
+++ b/drivers/pci/controller/dwc/pcie-histb.c
@@ -169,39 +169,36 @@ static int histb_pcie_link_up(struct dw_pcie *pci)
 	return 0;
 }
 
-static int histb_pcie_establish_link(struct pcie_port *pp)
+static int histb_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct histb_pcie *hipcie = to_histb_pcie(pci);
 	u32 regval;
 
-	if (dw_pcie_link_up(pci)) {
-		dev_info(pci->dev, "Link already up\n");
-		return 0;
-	}
-
-	/* PCIe RC work mode */
-	regval = histb_pcie_readl(hipcie, PCIE_SYS_CTRL0);
-	regval &= ~PCIE_DEVICE_TYPE_MASK;
-	regval |= PCIE_WM_RC;
-	histb_pcie_writel(hipcie, PCIE_SYS_CTRL0, regval);
-
-	/* setup root complex */
-	dw_pcie_setup_rc(pp);
-
 	/* assert LTSSM enable */
 	regval = histb_pcie_readl(hipcie, PCIE_SYS_CTRL7);
 	regval |= PCIE_APP_LTSSM_ENABLE;
 	histb_pcie_writel(hipcie, PCIE_SYS_CTRL7, regval);
 
-	return dw_pcie_wait_for_link(pci);
+	return 0;
 }
 
 static int histb_pcie_host_init(struct pcie_port *pp)
 {
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct histb_pcie *hipcie = to_histb_pcie(pci);
+	u32 regval;
+
 	pp->bridge->ops = &histb_pci_ops;
 
-	histb_pcie_establish_link(pp);
+	/* PCIe RC work mode */
+	regval = histb_pcie_readl(hipcie, PCIE_SYS_CTRL0);
+	regval &= ~PCIE_DEVICE_TYPE_MASK;
+	regval |= PCIE_WM_RC;
+	histb_pcie_writel(hipcie, PCIE_SYS_CTRL0, regval);
+
+	/* setup root complex */
+	dw_pcie_setup_rc(pp);
+
 	dw_pcie_msi_init(pp);
 
 	return 0;
@@ -300,6 +297,7 @@ static const struct dw_pcie_ops dw_pcie_ops = {
 	.read_dbi = histb_pcie_read_dbi,
 	.write_dbi = histb_pcie_write_dbi,
 	.link_up = histb_pcie_link_up,
+	.start_link = histb_pcie_start_link,
 };
 
 static int histb_pcie_probe(struct platform_device *pdev)
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index ba03dbca7885..675b4d8392d3 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -390,32 +390,14 @@ static int kirin_pcie_link_up(struct dw_pcie *pci)
 	return 0;
 }
 
-static int kirin_pcie_establish_link(struct pcie_port *pp)
+static int kirin_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
-	struct device *dev = kirin_pcie->pci->dev;
-	int count = 0;
-
-	if (kirin_pcie_link_up(pci))
-		return 0;
-
-	dw_pcie_setup_rc(pp);
 
 	/* assert LTSSM enable */
 	kirin_apb_ctrl_writel(kirin_pcie, PCIE_LTSSM_ENABLE_BIT,
 			      PCIE_APP_LTSSM_ENABLE);
 
-	/* check if the link is up or not */
-	while (!kirin_pcie_link_up(pci)) {
-		usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
-		count++;
-		if (count == 1000) {
-			dev_err(dev, "Link Fail\n");
-			return -EINVAL;
-		}
-	}
-
 	return 0;
 }
 
@@ -423,7 +405,7 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
 {
 	pp->bridge->ops = &kirin_pci_ops;
 
-	kirin_pcie_establish_link(pp);
+	dw_pcie_setup_rc(pp);
 	dw_pcie_msi_init(pp);
 
 	return 0;
@@ -433,6 +415,7 @@ static const struct dw_pcie_ops kirin_dw_pcie_ops = {
 	.read_dbi = kirin_pcie_read_dbi,
 	.write_dbi = kirin_pcie_write_dbi,
 	.link_up = kirin_pcie_link_up,
+	.start_link = kirin_pcie_start_link,
 };
 
 static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 7ac08f0cae17..8eb8ac2fb270 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -207,18 +207,15 @@ static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
 	usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
 }
 
-static int qcom_pcie_establish_link(struct qcom_pcie *pcie)
+static int qcom_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = pcie->pci;
-
-	if (dw_pcie_link_up(pci))
-		return 0;
+	struct qcom_pcie *pcie = to_qcom_pcie(pci);
 
 	/* Enable Link Training state machine */
 	if (pcie->ops->ltssm_enable)
 		pcie->ops->ltssm_enable(pcie);
 
-	return dw_pcie_wait_for_link(pci);
+	return 0;
 }
 
 static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
@@ -1288,15 +1285,8 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
 
 	qcom_ep_reset_deassert(pcie);
 
-	ret = qcom_pcie_establish_link(pcie);
-	if (ret)
-		goto err;
-
 	return 0;
-err:
-	qcom_ep_reset_assert(pcie);
-	if (pcie->ops->post_deinit)
-		pcie->ops->post_deinit(pcie);
+
 err_disable_phy:
 	phy_power_off(pcie->phy);
 err_deinit:
@@ -1363,6 +1353,7 @@ static const struct qcom_pcie_ops ops_2_7_0 = {
 
 static const struct dw_pcie_ops dw_pcie_ops = {
 	.link_up = qcom_pcie_link_up,
+	.start_link = qcom_pcie_start_link,
 };
 
 static int qcom_pcie_probe(struct platform_device *pdev)
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index 800c34a60a33..ebbaa06fc8ab 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -66,32 +66,10 @@ struct pcie_app_reg {
 
 #define to_spear13xx_pcie(x)	dev_get_drvdata((x)->dev)
 
-static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
+static int spear13xx_pcie_start_link(struct dw_pcie *pci)
 {
-	struct dw_pcie *pci = spear13xx_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
+	struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);
 	struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
-	u32 val;
-	u32 exp_cap_off = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
-
-	if (dw_pcie_link_up(pci)) {
-		dev_err(pci->dev, "link already up\n");
-		return 0;
-	}
-
-	dw_pcie_setup_rc(pp);
-
-	/*
-	 * this controller support only 128 bytes read size, however its
-	 * default value in capability register is 512 bytes. So force
-	 * it to 128 here.
-	 */
-	val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL);
-	val &= ~PCI_EXP_DEVCTL_READRQ;
-	dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL, val);
-
-	dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, 0x104A);
-	dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, 0xCD80);
 
 	/* enable ltssm */
 	writel(DEVICE_TYPE_RC | (1 << MISCTRL_EN_ID)
@@ -99,7 +77,7 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
 			| ((u32)1 << REG_TRANSLATION_ENABLE),
 			&app_reg->app_ctrl_0);
 
-	return dw_pcie_wait_for_link(pci);
+	return 0;
 }
 
 static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
@@ -151,10 +129,25 @@ static int spear13xx_pcie_host_init(struct pcie_port *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);
+	u32 exp_cap_off = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
+	u32 val;
 
 	spear13xx_pcie->app_base = pci->dbi_base + 0x2000;
 
-	spear13xx_pcie_establish_link(spear13xx_pcie);
+	dw_pcie_setup_rc(pp);
+
+	/*
+	 * this controller support only 128 bytes read size, however its
+	 * default value in capability register is 512 bytes. So force
+	 * it to 128 here.
+	 */
+	val = dw_pcie_readw_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL);
+	val &= ~PCI_EXP_DEVCTL_READRQ;
+	dw_pcie_writew_dbi(pci, exp_cap_off + PCI_EXP_DEVCTL, val);
+
+	dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, 0x104A);
+	dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, 0xCD80);
+
 	spear13xx_pcie_enable_interrupts(spear13xx_pcie);
 
 	return 0;
@@ -198,6 +191,7 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
 
 static const struct dw_pcie_ops dw_pcie_ops = {
 	.link_up = spear13xx_pcie_link_up,
+	.start_link = spear13xx_pcie_start_link,
 };
 
 static int spear13xx_pcie_probe(struct platform_device *pdev)
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 77fc3ba3dec1..f7d7b002a06d 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1549,7 +1549,6 @@ static int tegra_pcie_deinit_controller(struct tegra_pcie_dw *pcie)
 
 static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie)
 {
-	struct pcie_port *pp = &pcie->pci.pp;
 	struct device *dev = pcie->dev;
 	char *name;
 	int ret;
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index 6198bd106b8a..f4b776e231d6 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -146,16 +146,13 @@ static int uniphier_pcie_link_up(struct dw_pcie *pci)
 	return (val & mask) == mask;
 }
 
-static int uniphier_pcie_establish_link(struct dw_pcie *pci)
+static int uniphier_pcie_start_link(struct dw_pcie *pci)
 {
 	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
 
-	if (dw_pcie_link_up(pci))
-		return 0;
-
 	uniphier_pcie_ltssm_enable(priv, true);
 
-	return dw_pcie_wait_for_link(pci);
+	return 0;
 }
 
 static void uniphier_pcie_stop_link(struct dw_pcie *pci)
@@ -318,10 +315,6 @@ static int uniphier_pcie_host_init(struct pcie_port *pp)
 	uniphier_pcie_irq_enable(priv);
 
 	dw_pcie_setup_rc(pp);
-	ret = uniphier_pcie_establish_link(pci);
-	if (ret)
-		return ret;
-
 	dw_pcie_msi_init(pp);
 
 	return 0;
@@ -385,7 +378,7 @@ static int uniphier_pcie_host_enable(struct uniphier_pcie_priv *priv)
 }
 
 static const struct dw_pcie_ops dw_pcie_ops = {
-	.start_link = uniphier_pcie_establish_link,
+	.start_link = uniphier_pcie_start_link,
 	.stop_link = uniphier_pcie_stop_link,
 	.link_up = uniphier_pcie_link_up,
 };
-- 
2.25.1


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^ permalink raw reply related	[flat|nested] 8+ messages in thread

* [PATCH v2 11/16] PCI: dwc: Move dw_pcie_msi_init() into core
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
  2020-11-05 21:11   ` [PATCH v2 08/16] PCI: dwc: Move MSI interrupt setup into DWC common code Rob Herring
  2020-11-05 21:11   ` [PATCH v2 10/16] PCI: dwc: Move link handling into " Rob Herring
@ 2020-11-05 21:11   ` Rob Herring
  2020-11-05 21:11   ` [PATCH v2 12/16] PCI: dwc: Move dw_pcie_setup_rc() to DWC common code Rob Herring
                     ` (3 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, Masahiro Yamada, Thierry Reding,
	linux-arm-kernel, Jonathan Hunter, Fabio Estevam, Jerome Brunet,
	Jesper Nilsson, Lorenzo Pieralisi, Kevin Hilman, Pratyush Anand,
	linux-tegra, Krzysztof Kozlowski, Kishon Vijay Abraham I,
	Kukjin Kim, NXP Linux Team, Xiaowei Song, Richard Zhu,
	Martin Blumenstingl, linux-arm-msm, Sascha Hauer, Yue Wang,
	linux-samsung-soc, Bjorn Helgaas, linux-amlogic, linux-omap,
	linux-arm-kernel, Gustavo Pimentel, Andy Gross, Stanimir Varbanov,
	Pengutronix Kernel Team, Jingoo Han, Shawn Guo, Lucas Stach

The host drivers which call dw_pcie_msi_init() are all the ones using
the built-in MSI controller, so let's move it into the common DWC code.

Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Yue Wang <yue.wang@Amlogic.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Xiaowei Song <songxiaowei@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-omap@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@axis.com
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
 - Drop now static dw_pcie_msi_init symbol export
---
 drivers/pci/controller/dwc/pci-dra7xx.c           |  2 --
 drivers/pci/controller/dwc/pci-exynos.c           |  4 ----
 drivers/pci/controller/dwc/pci-imx6.c             |  1 -
 drivers/pci/controller/dwc/pci-meson.c            |  1 -
 drivers/pci/controller/dwc/pcie-artpec6.c         |  1 -
 drivers/pci/controller/dwc/pcie-designware-host.c |  9 +++++----
 drivers/pci/controller/dwc/pcie-designware-plat.c |  1 -
 drivers/pci/controller/dwc/pcie-designware.h      | 10 ----------
 drivers/pci/controller/dwc/pcie-histb.c           |  2 --
 drivers/pci/controller/dwc/pcie-kirin.c           |  1 -
 drivers/pci/controller/dwc/pcie-qcom.c            |  2 --
 drivers/pci/controller/dwc/pcie-spear13xx.c       |  6 +-----
 drivers/pci/controller/dwc/pcie-tegra194.c        |  2 --
 drivers/pci/controller/dwc/pcie-uniphier.c        |  1 -
 14 files changed, 6 insertions(+), 37 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 054423d9646d..72a5a2bf933b 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -182,8 +182,6 @@ static int dra7xx_pcie_host_init(struct pcie_port *pp)
 	struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
 
 	dw_pcie_setup_rc(pp);
-
-	dw_pcie_msi_init(pp);
 	dra7xx_pcie_enable_interrupts(dra7xx);
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index 6498b615c834..3939fe22e8a2 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -273,12 +273,8 @@ static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg)
 
 static void exynos_pcie_msi_init(struct exynos_pcie *ep)
 {
-	struct dw_pcie *pci = ep->pci;
-	struct pcie_port *pp = &pci->pp;
 	u32 val;
 
-	dw_pcie_msi_init(pp);
-
 	/* enable MSI interrupt */
 	val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_IRQ_EN_LEVEL);
 	val |= IRQ_MSI_ENABLE;
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 1fe8f3f2c380..9e30fbf4efbe 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -835,7 +835,6 @@ static int imx6_pcie_host_init(struct pcie_port *pp)
 	imx6_pcie_deassert_core_reset(imx6_pcie);
 	imx6_setup_phy_mpll(imx6_pcie);
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index 41a3351b100b..2df0adcf0bf2 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -381,7 +381,6 @@ static int meson_pcie_host_init(struct pcie_port *pp)
 	meson_set_max_rd_req_size(mp, MAX_READ_REQ_SIZE);
 
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 8b3da3038ac3..7ee8f3c83f8f 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -329,7 +329,6 @@ static int artpec6_pcie_host_init(struct pcie_port *pp)
 	artpec6_pcie_deassert_core_reset(artpec6_pcie);
 	artpec6_pcie_wait_for_phy(artpec6_pcie);
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 800e7a0415cf..ebea2c814448 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -256,7 +256,7 @@ int dw_pcie_allocate_domains(struct pcie_port *pp)
 	return 0;
 }
 
-void dw_pcie_free_msi(struct pcie_port *pp)
+static void dw_pcie_free_msi(struct pcie_port *pp)
 {
 	if (pp->msi_irq) {
 		irq_set_chained_handler(pp->msi_irq, NULL);
@@ -275,19 +275,18 @@ void dw_pcie_free_msi(struct pcie_port *pp)
 	}
 }
 
-void dw_pcie_msi_init(struct pcie_port *pp)
+static void dw_pcie_msi_init(struct pcie_port *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	u64 msi_target = (u64)pp->msi_data;
 
-	if (!IS_ENABLED(CONFIG_PCI_MSI))
+	if (!pci_msi_enabled() || !pp->has_msi_ctrl)
 		return;
 
 	/* Program the msi_data */
 	dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_LO, lower_32_bits(msi_target));
 	dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_HI, upper_32_bits(msi_target));
 }
-EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
 
 int dw_pcie_host_init(struct pcie_port *pp)
 {
@@ -423,6 +422,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 			goto err_free_msi;
 	}
 
+	dw_pcie_msi_init(pp);
+
 	if (!dw_pcie_link_up(pci) && pci->ops->start_link) {
 		ret = pci->ops->start_link(pci);
 		if (ret)
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index adebcaeb1a6c..dec24e595c3e 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -36,7 +36,6 @@ static const struct of_device_id dw_plat_pcie_of_match[];
 static int dw_plat_pcie_host_init(struct pcie_port *pp)
 {
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 5d374bab10d1..57326aebc6e1 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -363,8 +363,6 @@ static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci)
 
 #ifdef CONFIG_PCIE_DW_HOST
 irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
-void dw_pcie_msi_init(struct pcie_port *pp);
-void dw_pcie_free_msi(struct pcie_port *pp);
 void dw_pcie_setup_rc(struct pcie_port *pp);
 int dw_pcie_host_init(struct pcie_port *pp);
 void dw_pcie_host_deinit(struct pcie_port *pp);
@@ -377,14 +375,6 @@ static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
 	return IRQ_NONE;
 }
 
-static inline void dw_pcie_msi_init(struct pcie_port *pp)
-{
-}
-
-static inline void dw_pcie_free_msi(struct pcie_port *pp)
-{
-}
-
 static inline void dw_pcie_setup_rc(struct pcie_port *pp)
 {
 }
diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c
index ece544165059..210777c793ea 100644
--- a/drivers/pci/controller/dwc/pcie-histb.c
+++ b/drivers/pci/controller/dwc/pcie-histb.c
@@ -199,8 +199,6 @@ static int histb_pcie_host_init(struct pcie_port *pp)
 	/* setup root complex */
 	dw_pcie_setup_rc(pp);
 
-	dw_pcie_msi_init(pp);
-
 	return 0;
 }
 
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 675b4d8392d3..f84ac1b36b2c 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -406,7 +406,6 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
 	pp->bridge->ops = &kirin_pci_ops;
 
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 8eb8ac2fb270..eb107179d544 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1281,8 +1281,6 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
 	}
 
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
-
 	qcom_ep_reset_deassert(pcie);
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index ebbaa06fc8ab..31475e4493a7 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -102,16 +102,12 @@ static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
 
 static void spear13xx_pcie_enable_interrupts(struct spear13xx_pcie *spear13xx_pcie)
 {
-	struct dw_pcie *pci = spear13xx_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
 	struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
 
 	/* Enable MSI interrupt */
-	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		dw_pcie_msi_init(pp);
+	if (IS_ENABLED(CONFIG_PCI_MSI))
 		writel(readl(&app_reg->int_mask) |
 				MSI_CTRL_INT, &app_reg->int_mask);
-	}
 }
 
 static int spear13xx_pcie_link_up(struct dw_pcie *pci)
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f7d7b002a06d..84f3e0bb4c7a 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -765,8 +765,6 @@ static void tegra_pcie_enable_msi_interrupts(struct pcie_port *pp)
 	struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
 	u32 val;
 
-	dw_pcie_msi_init(pp);
-
 	/* Enable MSI interrupt generation */
 	val = appl_readl(pcie, APPL_INTR_EN_L0_0);
 	val |= APPL_INTR_EN_L0_0_SYS_MSI_INTR_EN;
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index f4b776e231d6..e6616408a29c 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -315,7 +315,6 @@ static int uniphier_pcie_host_init(struct pcie_port *pp)
 	uniphier_pcie_irq_enable(priv);
 
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	return 0;
 }
-- 
2.25.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply related	[flat|nested] 8+ messages in thread

* [PATCH v2 12/16] PCI: dwc: Move dw_pcie_setup_rc() to DWC common code
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
                     ` (2 preceding siblings ...)
  2020-11-05 21:11   ` [PATCH v2 11/16] PCI: dwc: Move dw_pcie_msi_init() into core Rob Herring
@ 2020-11-05 21:11   ` Rob Herring
  2020-11-05 21:11   ` [PATCH v2 13/16] PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init() Rob Herring
                     ` (2 subsequent siblings)
  6 siblings, 0 replies; 8+ messages in thread
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, Minghuan Lian, linux-arm-kernel,
	Thomas Petazzoni, Fabio Estevam, Jerome Brunet, Jesper Nilsson,
	Lorenzo Pieralisi, Kevin Hilman, Pratyush Anand,
	Krzysztof Kozlowski, Kishon Vijay Abraham I, Murali Karicheri,
	NXP Linux Team, Xiaowei Song, Richard Zhu, Martin Blumenstingl,
	linux-arm-msm, Sascha Hauer, linuxppc-dev, Yue Wang,
	linux-samsung-soc, Bjorn Helgaas, linux-amlogic, linux-omap,
	Mingkai Hu, linux-arm-kernel, Roy Zang, Masahiro Yamada,
	Gustavo Pimentel, Andy Gross, Stanimir Varbanov, Kukjin Kim,
	Pengutronix Kernel Team, Jingoo Han, Shawn Guo, Lucas Stach

All RC complex drivers must call dw_pcie_setup_rc(). The ordering of the
call shouldn't be too important other than being after any RC resets.

There's a few calls of dw_pcie_setup_rc() left as drivers implementing
suspend/resume need it.

Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Minghuan Lian <minghuan.Lian@nxp.com>
Cc: Mingkai Hu <mingkai.hu@nxp.com>
Cc: Roy Zang <roy.zang@nxp.com>
Cc: Yue Wang <yue.wang@Amlogic.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Xiaowei Song <songxiaowei@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-omap@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@axis.com
Cc: linux-arm-msm@vger.kernel.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/pci/controller/dwc/pci-dra7xx.c           | 1 -
 drivers/pci/controller/dwc/pci-exynos.c           | 1 -
 drivers/pci/controller/dwc/pci-imx6.c             | 1 -
 drivers/pci/controller/dwc/pci-keystone.c         | 2 --
 drivers/pci/controller/dwc/pci-layerscape.c       | 2 --
 drivers/pci/controller/dwc/pci-meson.c            | 2 --
 drivers/pci/controller/dwc/pcie-armada8k.c        | 2 --
 drivers/pci/controller/dwc/pcie-artpec6.c         | 1 -
 drivers/pci/controller/dwc/pcie-designware-host.c | 1 +
 drivers/pci/controller/dwc/pcie-designware-plat.c | 8 --------
 drivers/pci/controller/dwc/pcie-histb.c           | 3 ---
 drivers/pci/controller/dwc/pcie-kirin.c           | 2 --
 drivers/pci/controller/dwc/pcie-qcom.c            | 1 -
 drivers/pci/controller/dwc/pcie-spear13xx.c       | 2 --
 drivers/pci/controller/dwc/pcie-uniphier.c        | 2 --
 15 files changed, 1 insertion(+), 30 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 72a5a2bf933b..b105af63854a 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -181,7 +181,6 @@ static int dra7xx_pcie_host_init(struct pcie_port *pp)
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
 
-	dw_pcie_setup_rc(pp);
 	dra7xx_pcie_enable_interrupts(dra7xx);
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index 3939fe22e8a2..5c10a5432896 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -372,7 +372,6 @@ static int exynos_pcie_host_init(struct pcie_port *pp)
 	phy_init(ep->phy);
 
 	exynos_pcie_deassert_core_reset(ep);
-	dw_pcie_setup_rc(pp);
 	exynos_pcie_assert_reset(ep);
 
 	exynos_pcie_enable_interrupts(ep);
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 9e30fbf4efbe..f9547bb2cf1b 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -834,7 +834,6 @@ static int imx6_pcie_host_init(struct pcie_port *pp)
 	imx6_pcie_init_phy(imx6_pcie);
 	imx6_pcie_deassert_core_reset(imx6_pcie);
 	imx6_setup_phy_mpll(imx6_pcie);
-	dw_pcie_setup_rc(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 90b222b020a3..5a4bcc2b1ddb 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -807,8 +807,6 @@ static int __init ks_pcie_host_init(struct pcie_port *pp)
 	if (ret)
 		return ret;
 
-	dw_pcie_setup_rc(pp);
-
 	ks_pcie_stop_link(pci);
 	ks_pcie_setup_rc_app_regs(ks_pcie);
 	writew(PCI_IO_RANGE_TYPE_32 | (PCI_IO_RANGE_TYPE_32 << 8),
diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
index 0d84986c4c16..400ebbebd00f 100644
--- a/drivers/pci/controller/dwc/pci-layerscape.c
+++ b/drivers/pci/controller/dwc/pci-layerscape.c
@@ -136,8 +136,6 @@ static int ls_pcie_host_init(struct pcie_port *pp)
 
 	ls_pcie_drop_msg_tlp(pcie);
 
-	dw_pcie_setup_rc(pp);
-
 	return 0;
 }
 
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index 2df0adcf0bf2..04589f0decb2 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -380,8 +380,6 @@ static int meson_pcie_host_init(struct pcie_port *pp)
 	meson_set_max_payload(mp, MAX_PAYLOAD_SIZE);
 	meson_set_max_rd_req_size(mp, MAX_READ_REQ_SIZE);
 
-	dw_pcie_setup_rc(pp);
-
 	return 0;
 }
 
diff --git a/drivers/pci/controller/dwc/pcie-armada8k.c b/drivers/pci/controller/dwc/pcie-armada8k.c
index dd2926bbb901..4e2552dcf982 100644
--- a/drivers/pci/controller/dwc/pcie-armada8k.c
+++ b/drivers/pci/controller/dwc/pcie-armada8k.c
@@ -171,8 +171,6 @@ static int armada8k_pcie_host_init(struct pcie_port *pp)
 	u32 reg;
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 
-	dw_pcie_setup_rc(pp);
-
 	if (!dw_pcie_link_up(pci)) {
 		/* Disable LTSSM state machine to enable configuration */
 		reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_CONTROL_REG);
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 7ee8f3c83f8f..fcba9915a606 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -328,7 +328,6 @@ static int artpec6_pcie_host_init(struct pcie_port *pp)
 	artpec6_pcie_init_phy(artpec6_pcie);
 	artpec6_pcie_deassert_core_reset(artpec6_pcie);
 	artpec6_pcie_wait_for_phy(artpec6_pcie);
-	dw_pcie_setup_rc(pp);
 
 	return 0;
 }
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index ebea2c814448..f2b0a15ad72b 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -422,6 +422,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 			goto err_free_msi;
 	}
 
+	dw_pcie_setup_rc(pp);
 	dw_pcie_msi_init(pp);
 
 	if (!dw_pcie_link_up(pci) && pci->ops->start_link) {
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index dec24e595c3e..9b397c807261 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -33,15 +33,7 @@ struct dw_plat_pcie_of_data {
 
 static const struct of_device_id dw_plat_pcie_of_match[];
 
-static int dw_plat_pcie_host_init(struct pcie_port *pp)
-{
-	dw_pcie_setup_rc(pp);
-
-	return 0;
-}
-
 static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
-	.host_init = dw_plat_pcie_host_init,
 };
 
 static int dw_plat_pcie_establish_link(struct dw_pcie *pci)
diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c
index 210777c793ea..86f9d16c50d7 100644
--- a/drivers/pci/controller/dwc/pcie-histb.c
+++ b/drivers/pci/controller/dwc/pcie-histb.c
@@ -196,9 +196,6 @@ static int histb_pcie_host_init(struct pcie_port *pp)
 	regval |= PCIE_WM_RC;
 	histb_pcie_writel(hipcie, PCIE_SYS_CTRL0, regval);
 
-	/* setup root complex */
-	dw_pcie_setup_rc(pp);
-
 	return 0;
 }
 
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index f84ac1b36b2c..ac4bbdaf5324 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -405,8 +405,6 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
 {
 	pp->bridge->ops = &kirin_pci_ops;
 
-	dw_pcie_setup_rc(pp);
-
 	return 0;
 }
 
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index eb107179d544..e49791c4f846 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1280,7 +1280,6 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
 			goto err_disable_phy;
 	}
 
-	dw_pcie_setup_rc(pp);
 	qcom_ep_reset_deassert(pcie);
 
 	return 0;
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index 31475e4493a7..1a9e353bef55 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -130,8 +130,6 @@ static int spear13xx_pcie_host_init(struct pcie_port *pp)
 
 	spear13xx_pcie->app_base = pci->dbi_base + 0x2000;
 
-	dw_pcie_setup_rc(pp);
-
 	/*
 	 * this controller support only 128 bytes read size, however its
 	 * default value in capability register is 512 bytes. So force
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index e6616408a29c..2457e9dd098d 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -314,8 +314,6 @@ static int uniphier_pcie_host_init(struct pcie_port *pp)
 
 	uniphier_pcie_irq_enable(priv);
 
-	dw_pcie_setup_rc(pp);
-
 	return 0;
 }
 
-- 
2.25.1


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply related	[flat|nested] 8+ messages in thread

* [PATCH v2 13/16] PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init()
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
                     ` (3 preceding siblings ...)
  2020-11-05 21:11   ` [PATCH v2 12/16] PCI: dwc: Move dw_pcie_setup_rc() to DWC common code Rob Herring
@ 2020-11-05 21:11   ` Rob Herring
  2020-11-06  9:17   ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Marek Szyprowski
  2020-11-19 11:01   ` Lorenzo Pieralisi
  6 siblings, 0 replies; 8+ messages in thread
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Minghuan Lian, Jonathan Chocron, Fabio Estevam, Jerome Brunet,
	Jesper Nilsson, Lorenzo Pieralisi, Kevin Hilman, linux-arm-kernel,
	Murali Karicheri, NXP Linux Team, Xiaowei Song, Richard Zhu,
	Martin Blumenstingl, Sascha Hauer, Yue Wang, Bjorn Helgaas,
	linux-amlogic, Mingkai Hu, linux-arm-kernel, Roy Zang,
	Masahiro Yamada, linuxppc-dev, Pengutronix Kernel Team, Shawn Guo,
	Lucas Stach

Many calls to dw_pcie_host_init() are in a wrapper function with
nothing else now. Let's remove the pointless extra layer.

Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Minghuan Lian <minghuan.Lian@nxp.com>
Cc: Mingkai Hu <mingkai.hu@nxp.com>
Cc: Roy Zang <roy.zang@nxp.com>
Cc: Yue Wang <yue.wang@Amlogic.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Jonathan Chocron <jonnyc@amazon.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Xiaowei Song <songxiaowei@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@axis.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/pci/controller/dwc/pci-imx6.c       | 22 ++---------------
 drivers/pci/controller/dwc/pci-keystone.c   | 19 +--------------
 drivers/pci/controller/dwc/pci-layerscape.c | 26 ++-------------------
 drivers/pci/controller/dwc/pci-meson.c      | 22 ++---------------
 drivers/pci/controller/dwc/pcie-al.c        | 20 ++--------------
 drivers/pci/controller/dwc/pcie-artpec6.c   | 23 +++---------------
 drivers/pci/controller/dwc/pcie-kirin.c     | 11 ++-------
 drivers/pci/controller/dwc/pcie-uniphier.c  | 23 +++---------------
 8 files changed, 17 insertions(+), 149 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index f9547bb2cf1b..0cf1333c0440 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -842,25 +842,6 @@ static const struct dw_pcie_host_ops imx6_pcie_host_ops = {
 	.host_init = imx6_pcie_host_init,
 };
 
-static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
-			      struct platform_device *pdev)
-{
-	struct dw_pcie *pci = imx6_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	pp->ops = &imx6_pcie_host_ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static const struct dw_pcie_ops dw_pcie_ops = {
 	.start_link = imx6_pcie_start_link,
 };
@@ -1005,6 +986,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
+	pci->pp.ops = &imx6_pcie_host_ops;
 
 	imx6_pcie->pci = pci;
 	imx6_pcie->drvdata = of_device_get_match_data(dev);
@@ -1154,7 +1136,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = imx6_add_pcie_port(imx6_pcie, pdev);
+	ret = dw_pcie_host_init(&pci->pp);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 5a4bcc2b1ddb..719756160821 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -844,23 +844,6 @@ static irqreturn_t ks_pcie_err_irq_handler(int irq, void *priv)
 	return ks_pcie_handle_error_irq(ks_pcie);
 }
 
-static int __init ks_pcie_add_pcie_port(struct keystone_pcie *ks_pcie,
-					struct platform_device *pdev)
-{
-	struct dw_pcie *pci = ks_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static void ks_pcie_am654_write_dbi2(struct dw_pcie *pci, void __iomem *base,
 				     u32 reg, size_t size, u32 val)
 {
@@ -1255,7 +1238,7 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
 		}
 
 		pci->pp.ops = host_ops;
-		ret = ks_pcie_add_pcie_port(ks_pcie, pdev);
+		ret = dw_pcie_host_init(&pci->pp);
 		if (ret < 0)
 			goto err_get_sync;
 		break;
diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
index 400ebbebd00f..44ad34cdc3bc 100644
--- a/drivers/pci/controller/dwc/pci-layerscape.c
+++ b/drivers/pci/controller/dwc/pci-layerscape.c
@@ -232,31 +232,12 @@ static const struct of_device_id ls_pcie_of_match[] = {
 	{ },
 };
 
-static int __init ls_add_pcie_port(struct ls_pcie *pcie)
-{
-	struct dw_pcie *pci = pcie->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = pci->dev;
-	int ret;
-
-	pp->ops = pcie->drvdata->ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static int __init ls_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct dw_pcie *pci;
 	struct ls_pcie *pcie;
 	struct resource *dbi_base;
-	int ret;
 
 	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
 	if (!pcie)
@@ -270,6 +251,7 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
 
 	pci->dev = dev;
 	pci->ops = pcie->drvdata->dw_pcie_ops;
+	pci->pp.ops = pcie->drvdata->ops;
 
 	pcie->pci = pci;
 
@@ -285,11 +267,7 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, pcie);
 
-	ret = ls_add_pcie_port(pcie);
-	if (ret < 0)
-		return ret;
-
-	return 0;
+	return dw_pcie_host_init(&pci->pp);
 }
 
 static struct platform_driver ls_pcie_driver = {
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index 04589f0decb2..686ded034f22 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -387,25 +387,6 @@ static const struct dw_pcie_host_ops meson_pcie_host_ops = {
 	.host_init = meson_pcie_host_init,
 };
 
-static int meson_add_pcie_port(struct meson_pcie *mp,
-			       struct platform_device *pdev)
-{
-	struct dw_pcie *pci = &mp->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	pp->ops = &meson_pcie_host_ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static const struct dw_pcie_ops dw_pcie_ops = {
 	.link_up = meson_pcie_link_up,
 	.start_link = meson_pcie_start_link,
@@ -425,6 +406,7 @@ static int meson_pcie_probe(struct platform_device *pdev)
 	pci = &mp->pci;
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
+	pci->pp.ops = &meson_pcie_host_ops;
 	pci->num_lanes = 1;
 
 	mp->phy = devm_phy_get(dev, "pcie");
@@ -471,7 +453,7 @@ static int meson_pcie_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, mp);
 
-	ret = meson_add_pcie_port(mp, pdev);
+	ret = dw_pcie_host_init(&pci->pp);
 	if (ret < 0) {
 		dev_err(dev, "Add PCIe port failed, %d\n", ret);
 		goto err_phy;
diff --git a/drivers/pci/controller/dwc/pcie-al.c b/drivers/pci/controller/dwc/pcie-al.c
index d06866921187..7ac8a37d9ce0 100644
--- a/drivers/pci/controller/dwc/pcie-al.c
+++ b/drivers/pci/controller/dwc/pcie-al.c
@@ -322,23 +322,6 @@ static const struct dw_pcie_host_ops al_pcie_host_ops = {
 	.host_init = al_pcie_host_init,
 };
 
-static int al_add_pcie_port(struct pcie_port *pp,
-			    struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	pp->ops = &al_pcie_host_ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static const struct dw_pcie_ops dw_pcie_ops = {
 };
 
@@ -360,6 +343,7 @@ static int al_pcie_probe(struct platform_device *pdev)
 
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
+	pci->pp.ops = &al_pcie_host_ops;
 
 	al_pcie->pci = pci;
 	al_pcie->dev = dev;
@@ -384,7 +368,7 @@ static int al_pcie_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, al_pcie);
 
-	return al_add_pcie_port(&pci->pp, pdev);
+	return dw_pcie_host_init(&pci->pp);
 }
 
 static const struct of_device_id al_pcie_of_match[] = {
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index fcba9915a606..597c282f586c 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -336,25 +336,6 @@ static const struct dw_pcie_host_ops artpec6_pcie_host_ops = {
 	.host_init = artpec6_pcie_host_init,
 };
 
-static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
-				 struct platform_device *pdev)
-{
-	struct dw_pcie *pci = artpec6_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = pci->dev;
-	int ret;
-
-	pp->ops = &artpec6_pcie_host_ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 static void artpec6_pcie_ep_init(struct dw_pcie_ep *ep)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@@ -445,7 +426,9 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
 		if (!IS_ENABLED(CONFIG_PCIE_ARTPEC6_HOST))
 			return -ENODEV;
 
-		ret = artpec6_add_pcie_port(artpec6_pcie, pdev);
+		pci->pp.ops = &artpec6_pcie_host_ops;
+
+		ret = dw_pcie_host_init(&pci->pp);
 		if (ret < 0)
 			return ret;
 		break;
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index ac4bbdaf5324..026fd1e42a55 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -419,14 +419,6 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
 	.host_init = kirin_pcie_host_init,
 };
 
-static int kirin_add_pcie_port(struct dw_pcie *pci,
-			       struct platform_device *pdev)
-{
-	pci->pp.ops = &kirin_pcie_host_ops;
-
-	return dw_pcie_host_init(&pci->pp);
-}
-
 static int kirin_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -449,6 +441,7 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 
 	pci->dev = dev;
 	pci->ops = &kirin_dw_pcie_ops;
+	pci->pp.ops = &kirin_pcie_host_ops;
 	kirin_pcie->pci = pci;
 
 	ret = kirin_pcie_get_clk(kirin_pcie, pdev);
@@ -474,7 +467,7 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, kirin_pcie);
 
-	return kirin_add_pcie_port(pci, pdev);
+	return dw_pcie_host_init(&pci->pp);
 }
 
 static const struct of_device_id kirin_pcie_match[] = {
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index 2457e9dd098d..7e8bad326770 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -321,25 +321,6 @@ static const struct dw_pcie_host_ops uniphier_pcie_host_ops = {
 	.host_init = uniphier_pcie_host_init,
 };
 
-static int uniphier_add_pcie_port(struct uniphier_pcie_priv *priv,
-				  struct platform_device *pdev)
-{
-	struct dw_pcie *pci = &priv->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	pp->ops = &uniphier_pcie_host_ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "Failed to initialize host (%d)\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
 static int uniphier_pcie_host_enable(struct uniphier_pcie_priv *priv)
 {
 	int ret;
@@ -415,7 +396,9 @@ static int uniphier_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	return uniphier_add_pcie_port(priv, pdev);
+	priv->pci.pp.ops = &uniphier_pcie_host_ops;
+
+	return dw_pcie_host_init(&priv->pci.pp);
 }
 
 static const struct of_device_id uniphier_pcie_match[] = {
-- 
2.25.1


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^ permalink raw reply related	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 00/16] PCI: dwc: Another round of clean-ups
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
                     ` (4 preceding siblings ...)
  2020-11-05 21:11   ` [PATCH v2 13/16] PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init() Rob Herring
@ 2020-11-06  9:17   ` Marek Szyprowski
  2020-11-19 11:01   ` Lorenzo Pieralisi
  6 siblings, 0 replies; 8+ messages in thread
From: Marek Szyprowski @ 2020-11-06  9:17 UTC (permalink / raw)
  To: Rob Herring, Lorenzo Pieralisi
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, linux-tegra, Thierry Reding, linux-arm-kernel,
	Thomas Petazzoni, Jonathan Chocron, Shawn Guo, Jonathan Hunter,
	Fabio Estevam, Jerome Brunet, Jesper Nilsson, linux-samsung-soc,
	Minghuan Lian, Kevin Hilman, Pratyush Anand, Krzysztof Kozlowski,
	Kishon Vijay Abraham I, Kukjin Kim, Mingkai Hu, Xiaowei Song,
	NXP Linux Team, Richard Zhu, Martin Blumenstingl, linux-arm-msm,
	Sascha Hauer, Yue Wang, Murali Karicheri, Bjorn Helgaas,
	linux-amlogic, linux-omap, linux-arm-kernel, Roy Zang,
	Masahiro Yamada, Jingoo Han, Andy Gross, Vidya Sagar,
	Stanimir Varbanov, Pengutronix Kernel Team, Gustavo Pimentel,
	linuxppc-dev, Lucas Stach

Hi Rob,

On 05.11.2020 22:11, Rob Herring wrote:
> Here's another batch of DWC PCI host refactoring. This series primarily
> moves more of the MSI, link up, and resource handling to the core
> code. Beyond a couple of minor fixes, new in this version is runtime
> detection of iATU regions instead of using DT properties.

iATU detection seems to work fine with 
https://lore.kernel.org/linux-samsung-soc/20201029134017.27400-1-m.szyprowski@samsung.com/ 
on top of your patchset on Samsung Exynos5433 SoC:

exynos-pcie 15700000.pcie: host bridge /soc@0/pcie@15700000 ranges:
exynos-pcie 15700000.pcie:       IO 0x000c001000..0x000c010fff -> 
0x0000000000
exynos-pcie 15700000.pcie:      MEM 0x000c011000..0x000ffffffe -> 
0x000c011000
exynos-pcie 15700000.pcie: iATU unroll: disabled
exynos-pcie 15700000.pcie: Detected iATU regions: 3 outbound, 5 inbound
exynos-pcie 15700000.pcie: Link up
exynos-pcie 15700000.pcie: PCI host bridge to bus 0000:00

Fell free to add my:

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

> No doubt I've probably broken something. Please test. I've run this thru
> kernelci and checked boards with DWC PCI which currently is just
> Layerscape boards (hint: add boards and/or enable PCI). A git branch is
> here[1].
>
> This is dependent on "PCI: dwc: Restore ATU memory resource setup to use
> last entry" which will be in v5.10-rc3.
>
> Rob
>
> [1] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git pci-more-dwc-cleanup
>
> Rob Herring (16):
>    PCI: dwc: Support multiple ATU memory regions
>    PCI: dwc/intel-gw: Move ATU offset out of driver match data
>    PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into
>      common code
>    PCI: dwc/intel-gw: Remove some unneeded function wrappers
>    PCI: dwc: Ensure all outbound ATU windows are reset
>    PCI: dwc/dra7xx: Use the common MSI irq_chip
>    PCI: dwc: Drop the .set_num_vectors() host op
>    PCI: dwc: Move MSI interrupt setup into DWC common code
>    PCI: dwc: Rework MSI initialization
>    PCI: dwc: Move link handling into common code
>    PCI: dwc: Move dw_pcie_msi_init() into core
>    PCI: dwc: Move dw_pcie_setup_rc() to DWC common code
>    PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init()
>    Revert "PCI: dwc/keystone: Drop duplicated 'num-viewport'"
>    PCI: dwc: Move inbound and outbound windows to common struct
>    PCI: dwc: Detect number of iATU windows
>
>   drivers/pci/controller/dwc/pci-dra7xx.c       | 141 +-----------------
>   drivers/pci/controller/dwc/pci-exynos.c       |  50 ++-----
>   drivers/pci/controller/dwc/pci-imx6.c         |  39 +----
>   drivers/pci/controller/dwc/pci-keystone.c     |  79 ++--------
>   .../pci/controller/dwc/pci-layerscape-ep.c    |  37 +----
>   drivers/pci/controller/dwc/pci-layerscape.c   |  67 +--------
>   drivers/pci/controller/dwc/pci-meson.c        |  53 ++-----
>   drivers/pci/controller/dwc/pcie-al.c          |  29 +---
>   drivers/pci/controller/dwc/pcie-armada8k.c    |  37 ++---
>   drivers/pci/controller/dwc/pcie-artpec6.c     |  76 +---------
>   .../pci/controller/dwc/pcie-designware-ep.c   |  58 +++----
>   .../pci/controller/dwc/pcie-designware-host.c | 139 ++++++++++-------
>   .../pci/controller/dwc/pcie-designware-plat.c |  70 +--------
>   drivers/pci/controller/dwc/pcie-designware.c  |  93 +++++++++++-
>   drivers/pci/controller/dwc/pcie-designware.h  |  24 +--
>   drivers/pci/controller/dwc/pcie-histb.c       |  37 ++---
>   drivers/pci/controller/dwc/pcie-intel-gw.c    |  67 ++-------
>   drivers/pci/controller/dwc/pcie-kirin.c       |  62 +-------
>   drivers/pci/controller/dwc/pcie-qcom.c        |  38 +----
>   drivers/pci/controller/dwc/pcie-spear13xx.c   |  62 +++-----
>   drivers/pci/controller/dwc/pcie-tegra194.c    |  41 +----
>   drivers/pci/controller/dwc/pcie-uniphier-ep.c |  38 +----
>   drivers/pci/controller/dwc/pcie-uniphier.c    |  51 +------
>   23 files changed, 356 insertions(+), 1032 deletions(-)
>
> --
> 2.25.1
>
Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland


_______________________________________________
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^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 00/16] PCI: dwc: Another round of clean-ups
  2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
                     ` (5 preceding siblings ...)
  2020-11-06  9:17   ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Marek Szyprowski
@ 2020-11-19 11:01   ` Lorenzo Pieralisi
  6 siblings, 0 replies; 8+ messages in thread
From: Lorenzo Pieralisi @ 2020-11-19 11:01 UTC (permalink / raw)
  To: Rob Herring
  Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
	Bjorn Andersson, linux-tegra, Thierry Reding, linux-arm-kernel,
	Thomas Petazzoni, Jonathan Chocron, Shawn Guo,
	Kishon Vijay Abraham I, Fabio Estevam, Jerome Brunet,
	Jesper Nilsson, Lorenzo Pieralisi, Kevin Hilman, Pratyush Anand,
	Krzysztof Kozlowski, Jonathan Hunter, Murali Karicheri,
	NXP Linux Team, Xiaowei Song, Marek Szyprowski, Masahiro Yamada,
	Richard Zhu, Martin Blumenstingl, linux-arm-msm, Sascha Hauer,
	Yue Wang, linux-samsung-soc, Bjorn Helgaas, linux-amlogic,
	linux-omap, Mingkai Hu, linux-arm-kernel, Roy Zang, Minghuan Lian,
	Jingoo Han, Andy Gross, Vidya Sagar, Stanimir Varbanov,
	Kukjin Kim, Pengutronix Kernel Team, Gustavo Pimentel,
	linuxppc-dev, Lucas Stach

On Thu, 5 Nov 2020 15:11:43 -0600, Rob Herring wrote:
> Here's another batch of DWC PCI host refactoring. This series primarily
> moves more of the MSI, link up, and resource handling to the core
> code. Beyond a couple of minor fixes, new in this version is runtime
> detection of iATU regions instead of using DT properties.
> 
> No doubt I've probably broken something. Please test. I've run this thru
> kernelci and checked boards with DWC PCI which currently is just
> Layerscape boards (hint: add boards and/or enable PCI). A git branch is
> here[1].
> 
> [...]

Applied to pci/dwc, thanks!

[01/16] PCI: dwc: Support multiple ATU memory regions
        https://git.kernel.org/lpieralisi/pci/c/9f9e59a480
[02/16] PCI: dwc/intel-gw: Move ATU offset out of driver match data
        https://git.kernel.org/lpieralisi/pci/c/1d567aac46
[03/16] PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into common code
        https://git.kernel.org/lpieralisi/pci/c/a0fd361db8
[04/16] PCI: dwc/intel-gw: Remove some unneeded function wrappers
        https://git.kernel.org/lpieralisi/pci/c/1cc9a55999
[05/16] PCI: dwc: Ensure all outbound ATU windows are reset
        https://git.kernel.org/lpieralisi/pci/c/458ad06c4c
[06/16] PCI: dwc/dra7xx: Use the common MSI irq_chip
        https://git.kernel.org/lpieralisi/pci/c/7f170d35f5
[07/16] PCI: dwc: Drop the .set_num_vectors() host op
        https://git.kernel.org/lpieralisi/pci/c/331e9bcead
[08/16] PCI: dwc: Move MSI interrupt setup into DWC common code
        https://git.kernel.org/lpieralisi/pci/c/5bcb1757e6
[09/16] PCI: dwc: Rework MSI initialization
        https://git.kernel.org/lpieralisi/pci/c/f78f02638a
[10/16] PCI: dwc: Move link handling into common code
        https://git.kernel.org/lpieralisi/pci/c/886a9c1347
[11/16] PCI: dwc: Move dw_pcie_msi_init() into core
        https://git.kernel.org/lpieralisi/pci/c/59fbab1ae4
[12/16] PCI: dwc: Move dw_pcie_setup_rc() to DWC common code
        https://git.kernel.org/lpieralisi/pci/c/b9ac0f9dc8
[13/16] PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init()
        https://git.kernel.org/lpieralisi/pci/c/60f5b73fa0
[14/16] Revert "PCI: dwc/keystone: Drop duplicated 'num-viewport'"
        https://git.kernel.org/lpieralisi/pci/c/fcde397422
[15/16] PCI: dwc: Move inbound and outbound windows to common struct
        https://git.kernel.org/lpieralisi/pci/c/9ca17af552
[16/16] PCI: dwc: Detect number of iATU windows
        https://git.kernel.org/lpieralisi/pci/c/281f1f99cf

Thanks,
Lorenzo

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http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2020-11-19 11:02 UTC | newest]

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     [not found] <CGME20201105211208eucas1p29087cdd73805e670aff9f3a43f644e05@eucas1p2.samsung.com>
2020-11-05 21:11 ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Rob Herring
2020-11-05 21:11   ` [PATCH v2 08/16] PCI: dwc: Move MSI interrupt setup into DWC common code Rob Herring
2020-11-05 21:11   ` [PATCH v2 10/16] PCI: dwc: Move link handling into " Rob Herring
2020-11-05 21:11   ` [PATCH v2 11/16] PCI: dwc: Move dw_pcie_msi_init() into core Rob Herring
2020-11-05 21:11   ` [PATCH v2 12/16] PCI: dwc: Move dw_pcie_setup_rc() to DWC common code Rob Herring
2020-11-05 21:11   ` [PATCH v2 13/16] PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init() Rob Herring
2020-11-06  9:17   ` [PATCH v2 00/16] PCI: dwc: Another round of clean-ups Marek Szyprowski
2020-11-19 11:01   ` Lorenzo Pieralisi

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