[PATCH 11/19] PCI: Move setting pci_host_bridge.busnr out of host drivers

Rob Herring
2020-07-22T02:31:06Z

Most host drivers only parse the DT bus range to set the root bus number
in pci_host_bridge.busnr. The ones that don't set busnr are buggy in
that they ignore what's in DT. Let's set busnr in pci_scan_root_bus_bridge()
where we already check for the bus resource and remove setting it in
host drivers.

Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Will Deacon <will@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Ryder Lee <ryder.lee@mediatek.com>
Cc: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: linux-tegra@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/pci/controller/dwc/pcie-designware-host.c | 4 ----
drivers/pci/controller/dwc/pcie-designware.h | 1 -
drivers/pci/controller/pci-aardvark.c | 5 ++---
drivers/pci/controller/pci-host-common.c | 1 -
drivers/pci/controller/pci-tegra.c | 4 +---
drivers/pci/controller/pci-v3-semi.c | 2 --
drivers/pci/controller/pcie-mediatek.c | 8 +-------
drivers/pci/controller/pcie-rcar-host.c | 1 -
drivers/pci/probe.c | 1 +
9 files changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 9e8a9cfc6d3a..fa922cb876a3 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -374,9 +374,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->cfg0_base = pp->cfg->start;
pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
break;
- case IORESOURCE_BUS:
- pp->busn = win->res;
- break;
}
}

@@ -474,7 +471,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
}

bridge->sysdata = pp;
- bridge->busnr = pp->busn->start;
bridge->ops = &dw_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index fd2146298b58..9fb44290ed43 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -188,7 +188,6 @@ struct pcie_port {
struct resource *cfg;
struct resource *io;
struct resource *mem;
- struct resource *busn;
int irq;
const struct dw_pcie_host_ops *ops;
int msi_irq;
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 07d4a75b5c8f..61c59a6935c9 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1104,7 +1104,7 @@ static int advk_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct advk_pcie *pcie;
- struct resource *res, *bus;
+ struct resource *res;
struct pci_host_bridge *bridge;
int ret, irq;

@@ -1133,12 +1133,11 @@ static int advk_pcie_probe(struct platform_device *pdev)
}

ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
- &bridge->dma_ranges, &bus);
+ &bridge->dma_ranges, NULL);
if (ret) {
dev_err(dev, "Failed to parse resources\n");
return ret;
}
- bridge->busnr = bus->start;

pcie->reset_gpio = devm_gpiod_get_from_of_node(dev, dev->of_node,
"reset-gpios", 0,
diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c
index ad395d7feddc..e662910fe032 100644
--- a/drivers/pci/controller/pci-host-common.c
+++ b/drivers/pci/controller/pci-host-common.c
@@ -77,7 +77,6 @@ int pci_host_common_probe(struct platform_device *pdev)
pci_add_flags(PCI_REASSIGN_ALL_BUS);

bridge->sysdata = cfg;
- bridge->busnr = cfg->busr.start;
bridge->ops = (struct pci_ops *)&ops->pci_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
index 5f91900c3fa3..9c91df9cd2ba 100644
--- a/drivers/pci/controller/pci-tegra.c
+++ b/drivers/pci/controller/pci-tegra.c
@@ -2670,7 +2670,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct pci_host_bridge *host;
struct tegra_pcie *pcie;
- struct resource *bus;
int err;

host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
@@ -2685,7 +2684,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&pcie->ports);
pcie->dev = dev;

- err = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL, &bus);
+ err = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL, NULL);
if (err) {
dev_err(dev, "Getting bridge resources failed\n");
return err;
@@ -2714,7 +2713,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
goto pm_runtime_put;
}

- host->busnr = bus->start;
host->ops = &tegra_pcie_ops;
host->map_irq = tegra_pcie_map_irq;
host->swizzle_irq = pci_common_swizzle;
diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
index d79af39e6e60..d2619f583bfb 100644
--- a/drivers/pci/controller/pci-v3-semi.c
+++ b/drivers/pci/controller/pci-v3-semi.c
@@ -584,8 +584,6 @@ static int v3_pci_setup_resource(struct v3_pci *v3,
}
break;
case IORESOURCE_BUS:
- dev_dbg(dev, "BUS %pR\n", win->res);
- host->busnr = win->res->start;
break;
default:
dev_info(dev, "Unknown resource type %lu\n",
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index a8710121264f..acbb656a8092 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -209,7 +209,6 @@ struct mtk_pcie_port {
* @mem: non-prefetchable memory resource
* @ports: pointer to PCIe port information
* @soc: pointer to SoC-dependent operations
- * @busnr: root bus number
*/
struct mtk_pcie {
struct device *dev;
@@ -218,7 +217,6 @@ struct mtk_pcie {

struct list_head ports;
const struct mtk_pcie_soc *soc;
- unsigned int busnr;
};

static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
@@ -1033,16 +1031,13 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
struct mtk_pcie_port *port, *tmp;
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
struct list_head *windows = &host->windows;
- struct resource *bus;
int err;

err = pci_parse_request_of_pci_ranges(dev, windows,
- &host->dma_ranges, &bus);
+ &host->dma_ranges, NULL);
if (err)
return err;

- pcie->busnr = bus->start;
-
for_each_available_child_of_node(node, child) {
int slot;

@@ -1096,7 +1091,6 @@ static int mtk_pcie_probe(struct platform_device *pdev)
if (err)
return err;

- host->busnr = pcie->busnr;
host->ops = pcie->soc->ops;
host->map_irq = of_irq_parse_and_map_pci;
host->swizzle_irq = pci_common_swizzle;
diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index bf10f1cf04f4..58f4d339eb0c 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -224,7 +224,6 @@ static int rcar_pcie_setup(struct list_head *resource,
i++;
break;
case IORESOURCE_BUS:
- bridge->busnr = res->start;
break;
default:
continue;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 5583037dbdfa..f850782efc35 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -3088,6 +3088,7 @@ int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge)

resource_list_for_each_entry(window, &bridge->windows)
if (window->res->flags & IORESOURCE_BUS) {
+ bridge->busnr = window->res->start;
found = true;
break;