diff mbox series

[v2,06/25] PCI: faraday: Use pci_parse_request_of_pci_ranges

Message ID 20191016200647.32050-7-robh@kernel.org (mailing list archive)
State New, archived
Headers show
Series PCI host resource consolidation | expand

Commit Message

Rob Herring (Arm) Oct. 16, 2019, 8:06 p.m. UTC 
Convert the Faraday host bridge to use the common
pci_parse_request_of_pci_ranges().

There's no need to assign the resources to a temporary list first. Just
use bridge->windows directly and remove all the temporary list handling.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Andrew Murray <andrew.murray@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
- New patch

 drivers/pci/controller/pci-ftpci100.c | 51 ++++++---------------------
 1 file changed, 11 insertions(+), 40 deletions(-)

--
2.20.1

Comments

Andrew Murray Oct. 18, 2019, 12:57 p.m. UTC | #1 
On Wed, Oct 16, 2019 at 03:06:28PM -0500, Rob Herring wrote:
> Convert the Faraday host bridge to use the common
> pci_parse_request_of_pci_ranges().
> 
> There's no need to assign the resources to a temporary list first. Just
> use bridge->windows directly and remove all the temporary list handling.
> 
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Andrew Murray <andrew.murray@arm.com>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> v2:
> - New patch
> 

Reviewed-by: Andrew Murray <andrew.murray@arm.com>

>  drivers/pci/controller/pci-ftpci100.c | 51 ++++++---------------------
>  1 file changed, 11 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/pci/controller/pci-ftpci100.c b/drivers/pci/controller/pci-ftpci100.c
> index bf5ece5d9291..12bc7daef5b5 100644
> --- a/drivers/pci/controller/pci-ftpci100.c
> +++ b/drivers/pci/controller/pci-ftpci100.c
> @@ -430,10 +430,8 @@ static int faraday_pci_probe(struct platform_device *pdev)
>  	const struct faraday_pci_variant *variant =
>  		of_device_get_match_data(dev);
>  	struct resource *regs;
> -	resource_size_t io_base;
>  	struct resource_entry *win;
>  	struct faraday_pci *p;
> -	struct resource *mem;
>  	struct resource *io;
>  	struct pci_host_bridge *host;
>  	struct clk *clk;
> @@ -441,7 +439,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
>  	unsigned char cur_bus_speed = PCI_SPEED_33MHz;
>  	int ret;
>  	u32 val;
> -	LIST_HEAD(res);
> 
>  	host = devm_pci_alloc_host_bridge(dev, sizeof(*p));
>  	if (!host)
> @@ -480,44 +477,20 @@ static int faraday_pci_probe(struct platform_device *pdev)
>  	if (IS_ERR(p->base))
>  		return PTR_ERR(p->base);
> 
> -	ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
> -						    &res, &io_base);
> +	ret = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL);
>  	if (ret)
>  		return ret;
> 
> -	ret = devm_request_pci_bus_resources(dev, &res);
> -	if (ret)
> -		return ret;
> -
> -	/* Get the I/O and memory ranges from DT */
> -	resource_list_for_each_entry(win, &res) {
> -		switch (resource_type(win->res)) {
> -		case IORESOURCE_IO:
> -			io = win->res;
> -			io->name = "Gemini PCI I/O";
> -			if (!faraday_res_to_memcfg(io->start - win->offset,
> -						   resource_size(io), &val)) {
> -				/* setup I/O space size */
> -				writel(val, p->base + PCI_IOSIZE);
> -			} else {
> -				dev_err(dev, "illegal IO mem size\n");
> -				return -EINVAL;
> -			}
> -			ret = devm_pci_remap_iospace(dev, io, io_base);
> -			if (ret) {
> -				dev_warn(dev, "error %d: failed to map resource %pR\n",
> -					 ret, io);
> -				continue;
> -			}
> -			break;
> -		case IORESOURCE_MEM:
> -			mem = win->res;
> -			mem->name = "Gemini PCI MEM";
> -			break;
> -		case IORESOURCE_BUS:
> -			break;
> -		default:
> -			break;
> +	win = resource_list_get_entry_of_type(&host->windows, IORESOURCE_IO);
> +	if (win) {
> +		io = win->res;
> +		if (!faraday_res_to_memcfg(io->start - win->offset,
> +					   resource_size(io), &val)) {
> +			/* setup I/O space size */
> +			writel(val, p->base + PCI_IOSIZE);
> +		} else {
> +			dev_err(dev, "illegal IO mem size\n");
> +			return -EINVAL;
>  		}
>  	}
> 
> @@ -569,7 +542,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
> 
> -	list_splice_init(&res, &host->windows);
>  	ret = pci_scan_root_bus_bridge(host);
>  	if (ret) {
>  		dev_err(dev, "failed to scan host: %d\n", ret);
> @@ -581,7 +553,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
> 
>  	pci_bus_assign_resources(p->bus);
>  	pci_bus_add_devices(p->bus);
> -	pci_free_resource_list(&res);
> 
>  	return 0;
>  }
> --
> 2.20.1
diff mbox series

Patch

diff --git a/drivers/pci/controller/pci-ftpci100.c b/drivers/pci/controller/pci-ftpci100.c
index bf5ece5d9291..12bc7daef5b5 100644
--- a/drivers/pci/controller/pci-ftpci100.c
+++ b/drivers/pci/controller/pci-ftpci100.c
@@ -430,10 +430,8 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	const struct faraday_pci_variant *variant =
 		of_device_get_match_data(dev);
 	struct resource *regs;
-	resource_size_t io_base;
 	struct resource_entry *win;
 	struct faraday_pci *p;
-	struct resource *mem;
 	struct resource *io;
 	struct pci_host_bridge *host;
 	struct clk *clk;
@@ -441,7 +439,6 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	unsigned char cur_bus_speed = PCI_SPEED_33MHz;
 	int ret;
 	u32 val;
-	LIST_HEAD(res);

 	host = devm_pci_alloc_host_bridge(dev, sizeof(*p));
 	if (!host)
@@ -480,44 +477,20 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	if (IS_ERR(p->base))
 		return PTR_ERR(p->base);

-	ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
-						    &res, &io_base);
+	ret = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL);
 	if (ret)
 		return ret;

-	ret = devm_request_pci_bus_resources(dev, &res);
-	if (ret)
-		return ret;
-
-	/* Get the I/O and memory ranges from DT */
-	resource_list_for_each_entry(win, &res) {
-		switch (resource_type(win->res)) {
-		case IORESOURCE_IO:
-			io = win->res;
-			io->name = "Gemini PCI I/O";
-			if (!faraday_res_to_memcfg(io->start - win->offset,
-						   resource_size(io), &val)) {
-				/* setup I/O space size */
-				writel(val, p->base + PCI_IOSIZE);
-			} else {
-				dev_err(dev, "illegal IO mem size\n");
-				return -EINVAL;
-			}
-			ret = devm_pci_remap_iospace(dev, io, io_base);
-			if (ret) {
-				dev_warn(dev, "error %d: failed to map resource %pR\n",
-					 ret, io);
-				continue;
-			}
-			break;
-		case IORESOURCE_MEM:
-			mem = win->res;
-			mem->name = "Gemini PCI MEM";
-			break;
-		case IORESOURCE_BUS:
-			break;
-		default:
-			break;
+	win = resource_list_get_entry_of_type(&host->windows, IORESOURCE_IO);
+	if (win) {
+		io = win->res;
+		if (!faraday_res_to_memcfg(io->start - win->offset,
+					   resource_size(io), &val)) {
+			/* setup I/O space size */
+			writel(val, p->base + PCI_IOSIZE);
+		} else {
+			dev_err(dev, "illegal IO mem size\n");
+			return -EINVAL;
 		}
 	}

@@ -569,7 +542,6 @@  static int faraday_pci_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;

-	list_splice_init(&res, &host->windows);
 	ret = pci_scan_root_bus_bridge(host);
 	if (ret) {
 		dev_err(dev, "failed to scan host: %d\n", ret);
@@ -581,7 +553,6 @@  static int faraday_pci_probe(struct platform_device *pdev)

 	pci_bus_assign_resources(p->bus);
 	pci_bus_add_devices(p->bus);
-	pci_free_resource_list(&res);

 	return 0;
 }