From: Honghui Zhang <[email protected]>
Use the devm_of_pci_get_host_bridge_resources() API in place of the PCI OF
DT parser.
Signed-off-by: Honghui Zhang <[email protected]>
---
drivers/pci/controller/pcie-mediatek.c | 109 +++++++++------------------------
1 file changed, 29 insertions(+), 80 deletions(-)
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 2a1f97c..6632d4e 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -197,29 +197,20 @@ struct mtk_pcie_port {
* @dev: pointer to PCIe device
* @base: IO mapped register base
* @free_ck: free-run reference clock
- * @io: IO resource
- * @pio: PIO resource
* @mem: non-prefetchable memory resource
- * @busn: bus range
- * @offset: IO / Memory offset
* @ports: pointer to PCIe port information
* @soc: pointer to SoC-dependent operations
+ * @busnr: root bus number
*/
struct mtk_pcie {
struct device *dev;
void __iomem *base;
struct clk *free_ck;
- struct resource io;
- struct resource pio;
struct resource mem;
- struct resource busn;
- struct {
- resource_size_t mem;
- resource_size_t io;
- } offset;
struct list_head ports;
const struct mtk_pcie_soc *soc;
+ int busnr;
};
static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
@@ -1045,55 +1036,42 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
{
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node, *child;
- struct of_pci_range_parser parser;
- struct of_pci_range range;
- struct resource res;
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_entry *win, *tmp_win;
+ resource_size_t io_base;
int err;
- if (of_pci_range_parser_init(&parser, node)) {
- dev_err(dev, "missing \"ranges\" property\n");
- return -EINVAL;
- }
+ err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
+ windows, &io_base);
+ if (err)
+ return err;
- for_each_of_pci_range(&parser, &range) {
- err = of_pci_range_to_resource(&range, node, &res);
- if (err < 0)
- return err;
+ err = devm_request_pci_bus_resources(dev, windows);
+ if (err < 0)
+ return err;
- switch (res.flags & IORESOURCE_TYPE_BITS) {
+ /* Get the I/O and memory ranges from DT */
+ resource_list_for_each_entry_safe(win, tmp_win, windows) {
+ switch (resource_type(win->res)) {
case IORESOURCE_IO:
- pcie->offset.io = res.start - range.pci_addr;
-
- memcpy(&pcie->pio, &res, sizeof(res));
- pcie->pio.name = node->full_name;
-
- pcie->io.start = range.cpu_addr;
- pcie->io.end = range.cpu_addr + range.size - 1;
- pcie->io.flags = IORESOURCE_MEM;
- pcie->io.name = "I/O";
-
- memcpy(&res, &pcie->io, sizeof(res));
- break;
-
+ err = devm_pci_remap_iospace(dev, win->res, io_base);
+ if (err) {
+ dev_warn(dev, "error %d: failed to map resource %pR\n",
+ err, win->res);
+ resource_list_destroy_entry(win);
+ }
case IORESOURCE_MEM:
- pcie->offset.mem = res.start - range.pci_addr;
-
- memcpy(&pcie->mem, &res, sizeof(res));
+ memcpy(&pcie->mem, win->res, sizeof(*win->res));
pcie->mem.name = "non-prefetchable";
break;
+ case IORESOURCE_BUS:
+ pcie->busnr = win->res->start;
+ break;
}
}
- err = of_pci_parse_bus_range(node, &pcie->busn);
- if (err < 0) {
- dev_err(dev, "failed to parse bus ranges property: %d\n", err);
- pcie->busn.name = node->name;
- pcie->busn.start = 0;
- pcie->busn.end = 0xff;
- pcie->busn.flags = IORESOURCE_BUS;
- }
-
for_each_available_child_of_node(node, child) {
int slot;
@@ -1125,28 +1103,6 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
return 0;
}
-static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
-{
- struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
- struct list_head *windows = &host->windows;
- struct device *dev = pcie->dev;
- int err;
-
- pci_add_resource_offset(windows, &pcie->pio, pcie->offset.io);
- pci_add_resource_offset(windows, &pcie->mem, pcie->offset.mem);
- pci_add_resource(windows, &pcie->busn);
-
- err = devm_request_pci_bus_resources(dev, windows);
- if (err < 0)
- return err;
-
- err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
- if (err < 0)
- return err;
-
- return 0;
-}
-
static int mtk_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1169,11 +1125,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
if (err)
return err;
- err = mtk_pcie_request_resources(pcie);
- if (err)
- goto put_resources;
-
- host->busnr = pcie->busn.start;
+ host->busnr = pcie->busnr;
host->dev.parent = pcie->dev;
host->ops = pcie->soc->ops;
host->map_irq = of_irq_parse_and_map_pci;
@@ -1181,12 +1133,9 @@ static int mtk_pcie_probe(struct platform_device *pdev)
host->sysdata = pcie;
err = pci_host_probe(host);
- if (err)
- goto put_resources;
-
- return 0;
+ if (!err)
+ return 0;
-put_resources:
if (!list_empty(&pcie->ports))
mtk_pcie_put_resources(pcie);
--
2.6.4
On Fri, 2018-11-02 at 14:36 +0800, Ryder Lee wrote:
> On Thu, 2018-10-18 at 11:23 +0800, Honghui Zhang (张洪辉) wrote:
> > From: Honghui Zhang <[email protected]>
> >
> > Use the devm_of_pci_get_host_bridge_resources() API in place of the PCI OF
> > DT parser.
> >
> > Signed-off-by: Honghui Zhang <[email protected]>
> > ---
> > drivers/pci/controller/pcie-mediatek.c | 109 +++++++++------------------------
> > 1 file changed, 29 insertions(+), 80 deletions(-)
> >
[......]
> >
>
> Acked-by: Ryder Lee <[email protected]>
>
>
Hi, Lorenzo, could you help take a look at this patch?
Thanks.
On Thu, Oct 18, 2018 at 11:23:34AM +0800, [email protected] wrote:
> From: Honghui Zhang <[email protected]>
>
> Use the devm_of_pci_get_host_bridge_resources() API in place of the PCI OF
> DT parser.
>
> Signed-off-by: Honghui Zhang <[email protected]>
> ---
> drivers/pci/controller/pcie-mediatek.c | 109 +++++++++------------------------
> 1 file changed, 29 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
> index 2a1f97c..6632d4e 100644
> --- a/drivers/pci/controller/pcie-mediatek.c
> +++ b/drivers/pci/controller/pcie-mediatek.c
> @@ -197,29 +197,20 @@ struct mtk_pcie_port {
> * @dev: pointer to PCIe device
> * @base: IO mapped register base
> * @free_ck: free-run reference clock
> - * @io: IO resource
> - * @pio: PIO resource
> * @mem: non-prefetchable memory resource
> - * @busn: bus range
> - * @offset: IO / Memory offset
> * @ports: pointer to PCIe port information
> * @soc: pointer to SoC-dependent operations
> + * @busnr: root bus number
> */
> struct mtk_pcie {
> struct device *dev;
> void __iomem *base;
> struct clk *free_ck;
>
> - struct resource io;
> - struct resource pio;
> struct resource mem;
> - struct resource busn;
> - struct {
> - resource_size_t mem;
> - resource_size_t io;
> - } offset;
> struct list_head ports;
> const struct mtk_pcie_soc *soc;
> + int busnr;
If you move the code initializing and probing the pci_host_bridge into
mtk_pcie_setup() (and rename that function) this variable becomes
useless. It should be an unsigned int, by the way.
> };
>
> static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
> @@ -1045,55 +1036,42 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
> {
> struct device *dev = pcie->dev;
> struct device_node *node = dev->of_node, *child;
> - struct of_pci_range_parser parser;
> - struct of_pci_range range;
> - struct resource res;
> 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_entry *win, *tmp_win;
> + resource_size_t io_base;
> int err;
>
> - if (of_pci_range_parser_init(&parser, node)) {
> - dev_err(dev, "missing \"ranges\" property\n");
> - return -EINVAL;
> - }
> + err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
> + windows, &io_base);
> + if (err)
> + return err;
>
> - for_each_of_pci_range(&parser, &range) {
> - err = of_pci_range_to_resource(&range, node, &res);
> - if (err < 0)
> - return err;
> + err = devm_request_pci_bus_resources(dev, windows);
> + if (err < 0)
> + return err;
>
> - switch (res.flags & IORESOURCE_TYPE_BITS) {
> + /* Get the I/O and memory ranges from DT */
> + resource_list_for_each_entry_safe(win, tmp_win, windows) {
> + switch (resource_type(win->res)) {
> case IORESOURCE_IO:
> - pcie->offset.io = res.start - range.pci_addr;
> -
> - memcpy(&pcie->pio, &res, sizeof(res));
> - pcie->pio.name = node->full_name;
> -
> - pcie->io.start = range.cpu_addr;
> - pcie->io.end = range.cpu_addr + range.size - 1;
> - pcie->io.flags = IORESOURCE_MEM;
> - pcie->io.name = "I/O";
> -
> - memcpy(&res, &pcie->io, sizeof(res));
> - break;
> -
> + err = devm_pci_remap_iospace(dev, win->res, io_base);
> + if (err) {
> + dev_warn(dev, "error %d: failed to map resource %pR\n",
> + err, win->res);
> + resource_list_destroy_entry(win);
> + }
Missing a break.
> case IORESOURCE_MEM:
> - pcie->offset.mem = res.start - range.pci_addr;
> -
> - memcpy(&pcie->mem, &res, sizeof(res));
> + memcpy(&pcie->mem, win->res, sizeof(*win->res));
> pcie->mem.name = "non-prefetchable";
> break;
> + case IORESOURCE_BUS:
> + pcie->busnr = win->res->start;
> + break;
> }
> }
>
> - err = of_pci_parse_bus_range(node, &pcie->busn);
> - if (err < 0) {
> - dev_err(dev, "failed to parse bus ranges property: %d\n", err);
> - pcie->busn.name = node->name;
> - pcie->busn.start = 0;
> - pcie->busn.end = 0xff;
> - pcie->busn.flags = IORESOURCE_BUS;
> - }
> -
> for_each_available_child_of_node(node, child) {
> int slot;
>
> @@ -1125,28 +1103,6 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
> return 0;
> }
>
> -static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
> -{
> - struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
> - struct list_head *windows = &host->windows;
> - struct device *dev = pcie->dev;
> - int err;
> -
> - pci_add_resource_offset(windows, &pcie->pio, pcie->offset.io);
> - pci_add_resource_offset(windows, &pcie->mem, pcie->offset.mem);
> - pci_add_resource(windows, &pcie->busn);
> -
> - err = devm_request_pci_bus_resources(dev, windows);
> - if (err < 0)
> - return err;
> -
> - err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
> - if (err < 0)
> - return err;
> -
> - return 0;
> -}
> -
> static int mtk_pcie_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -1169,11 +1125,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
> if (err)
> return err;
>
> - err = mtk_pcie_request_resources(pcie);
> - if (err)
> - goto put_resources;
> -
> - host->busnr = pcie->busn.start;
> + host->busnr = pcie->busnr;
> host->dev.parent = pcie->dev;
> host->ops = pcie->soc->ops;
> host->map_irq = of_irq_parse_and_map_pci;
> @@ -1181,12 +1133,9 @@ static int mtk_pcie_probe(struct platform_device *pdev)
> host->sysdata = pcie;
>
> err = pci_host_probe(host);
> - if (err)
> - goto put_resources;
> -
> - return 0;
> + if (!err)
> + return 0;
>
No, leave the error path.
err = pci_host_probe(host);
if (err)
goto put_resources;
return 0;
put_resources:
...
it is easier to follow.
Thanks,
Lorenzo
> -put_resources:
> if (!list_empty(&pcie->ports))
> mtk_pcie_put_resources(pcie);
>
> --
> 2.6.4
>
On Wed, 2018-11-07 at 12:03 +0000, Lorenzo Pieralisi wrote:
> On Thu, Oct 18, 2018 at 11:23:34AM +0800, [email protected] wrote:
> > From: Honghui Zhang <[email protected]>
> >
> > Use the devm_of_pci_get_host_bridge_resources() API in place of the PCI OF
> > DT parser.
> >
> > Signed-off-by: Honghui Zhang <[email protected]>
> > ---
> > drivers/pci/controller/pcie-mediatek.c | 109 +++++++++------------------------
> > 1 file changed, 29 insertions(+), 80 deletions(-)
> >
> > diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
> > index 2a1f97c..6632d4e 100644
> > --- a/drivers/pci/controller/pcie-mediatek.c
> > +++ b/drivers/pci/controller/pcie-mediatek.c
> > @@ -197,29 +197,20 @@ struct mtk_pcie_port {
> > * @dev: pointer to PCIe device
> > * @base: IO mapped register base
> > * @free_ck: free-run reference clock
> > - * @io: IO resource
> > - * @pio: PIO resource
> > * @mem: non-prefetchable memory resource
> > - * @busn: bus range
> > - * @offset: IO / Memory offset
> > * @ports: pointer to PCIe port information
> > * @soc: pointer to SoC-dependent operations
> > + * @busnr: root bus number
> > */
> > struct mtk_pcie {
> > struct device *dev;
> > void __iomem *base;
> > struct clk *free_ck;
> >
> > - struct resource io;
> > - struct resource pio;
> > struct resource mem;
> > - struct resource busn;
> > - struct {
> > - resource_size_t mem;
> > - resource_size_t io;
> > - } offset;
> > struct list_head ports;
> > const struct mtk_pcie_soc *soc;
> > + int busnr;
>
> If you move the code initializing and probing the pci_host_bridge into
> mtk_pcie_setup() (and rename that function) this variable becomes
> useless. It should be an unsigned int, by the way.
Yes, I can directly assign the busnr to host->busnr in the
mtk_pcie_setup and remove this variable.
Thanks.
>
> > };
> >
> > static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
> > @@ -1045,55 +1036,42 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
> > {
> > struct device *dev = pcie->dev;
> > struct device_node *node = dev->of_node, *child;
> > - struct of_pci_range_parser parser;
> > - struct of_pci_range range;
> > - struct resource res;
> > 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_entry *win, *tmp_win;
> > + resource_size_t io_base;
> > int err;
> >
> > - if (of_pci_range_parser_init(&parser, node)) {
> > - dev_err(dev, "missing \"ranges\" property\n");
> > - return -EINVAL;
> > - }
> > + err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
> > + windows, &io_base);
> > + if (err)
> > + return err;
> >
> > - for_each_of_pci_range(&parser, &range) {
> > - err = of_pci_range_to_resource(&range, node, &res);
> > - if (err < 0)
> > - return err;
> > + err = devm_request_pci_bus_resources(dev, windows);
> > + if (err < 0)
> > + return err;
> >
> > - switch (res.flags & IORESOURCE_TYPE_BITS) {
> > + /* Get the I/O and memory ranges from DT */
> > + resource_list_for_each_entry_safe(win, tmp_win, windows) {
> > + switch (resource_type(win->res)) {
> > case IORESOURCE_IO:
> > - pcie->offset.io = res.start - range.pci_addr;
> > -
> > - memcpy(&pcie->pio, &res, sizeof(res));
> > - pcie->pio.name = node->full_name;
> > -
> > - pcie->io.start = range.cpu_addr;
> > - pcie->io.end = range.cpu_addr + range.size - 1;
> > - pcie->io.flags = IORESOURCE_MEM;
> > - pcie->io.name = "I/O";
> > -
> > - memcpy(&res, &pcie->io, sizeof(res));
> > - break;
> > -
> > + err = devm_pci_remap_iospace(dev, win->res, io_base);
> > + if (err) {
> > + dev_warn(dev, "error %d: failed to map resource %pR\n",
> > + err, win->res);
> > + resource_list_destroy_entry(win);
> > + }
>
> Missing a break.
Thanks.
>
> > case IORESOURCE_MEM:
> > - pcie->offset.mem = res.start - range.pci_addr;
> > -
> > - memcpy(&pcie->mem, &res, sizeof(res));
> > + memcpy(&pcie->mem, win->res, sizeof(*win->res));
> > pcie->mem.name = "non-prefetchable";
> > break;
> > + case IORESOURCE_BUS:
> > + pcie->busnr = win->res->start;
> > + break;
> > }
> > }
> >
> > - err = of_pci_parse_bus_range(node, &pcie->busn);
> > - if (err < 0) {
> > - dev_err(dev, "failed to parse bus ranges property: %d\n", err);
> > - pcie->busn.name = node->name;
> > - pcie->busn.start = 0;
> > - pcie->busn.end = 0xff;
> > - pcie->busn.flags = IORESOURCE_BUS;
> > - }
> > -
> > for_each_available_child_of_node(node, child) {
> > int slot;
> >
> > @@ -1125,28 +1103,6 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
> > return 0;
> > }
> >
> > -static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
> > -{
> > - struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
> > - struct list_head *windows = &host->windows;
> > - struct device *dev = pcie->dev;
> > - int err;
> > -
> > - pci_add_resource_offset(windows, &pcie->pio, pcie->offset.io);
> > - pci_add_resource_offset(windows, &pcie->mem, pcie->offset.mem);
> > - pci_add_resource(windows, &pcie->busn);
> > -
> > - err = devm_request_pci_bus_resources(dev, windows);
> > - if (err < 0)
> > - return err;
> > -
> > - err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
> > - if (err < 0)
> > - return err;
> > -
> > - return 0;
> > -}
> > -
> > static int mtk_pcie_probe(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > @@ -1169,11 +1125,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
> > if (err)
> > return err;
> >
> > - err = mtk_pcie_request_resources(pcie);
> > - if (err)
> > - goto put_resources;
> > -
> > - host->busnr = pcie->busn.start;
> > + host->busnr = pcie->busnr;
> > host->dev.parent = pcie->dev;
> > host->ops = pcie->soc->ops;
> > host->map_irq = of_irq_parse_and_map_pci;
> > @@ -1181,12 +1133,9 @@ static int mtk_pcie_probe(struct platform_device *pdev)
> > host->sysdata = pcie;
> >
> > err = pci_host_probe(host);
> > - if (err)
> > - goto put_resources;
> > -
> > - return 0;
> > + if (!err)
> > + return 0;
> >
>
> No, leave the error path.
>
> err = pci_host_probe(host);
> if (err)
> goto put_resources;
>
> return 0;
> put_resources:
> ...
>
> it is easier to follow.
>
OK.
I will revert this snippet in the next version.
Thanks.
> Thanks,
> Lorenzo
>
> > -put_resources:
> > if (!list_empty(&pcie->ports))
> > mtk_pcie_put_resources(pcie);
> >
> > --
> > 2.6.4
> >