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staging: mt7621-pci: parse and prepare resources in 'mt7621_pci_parse_request_of_pci_ranges'

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Remove 'mt7621_pcie_add_resources' where resources are added to the host
windows moving this code into the function where all the parsing and
preparing code is being done: 'mt7621_pci_parse_request_of_pci_ranges'.
The memory resource has been properly parsed for the PCI APIs so we
only need to retrieve it and use it in those places we need.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20201123093637.8300-6-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2020-11-23 10:36:35 +01:00 committed by Greg Kroah-Hartman
parent 8713094e5b
commit 2fc0898bf3
1 changed files with 21 additions and 23 deletions
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44
drivers/staging/mt7621-pci/pci-mt7621.c
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@ -116,7 +116,7 @@ struct mt7621_pcie_port {
* struct mt7621_pcie - PCIe host information
* @base: IO Mapped Register Base
* @io: IO resource
* @mem: non-prefetchable memory resource
* @mem: pointer to non-prefetchable memory resource
* @dev: Pointer to PCIe device
* @io_map_base: virtual memory base address for io
* @ports: pointer to PCIe port information
@ -128,7 +128,7 @@ struct mt7621_pcie {
void __iomem *base;
struct device *dev;
struct resource io;
struct resource mem;
struct resource *mem;
unsigned long io_map_base;
struct list_head ports;
int irq_map[PCIE_P2P_CNT];
@ -256,7 +256,7 @@ static inline void mt7621_control_deassert(struct mt7621_pcie_port *port)
static void setup_cm_memory_region(struct mt7621_pcie *pcie)
{
struct resource *mem_resource = &pcie->mem;
struct resource *mem_resource = pcie->mem;
struct device *dev = pcie->dev;
resource_size_t mask;
@ -286,12 +286,15 @@ static int mt7621_map_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
return irq;
}
static int mt7621_pci_parse_request_of_pci_ranges(struct mt7621_pcie *pcie)
static int mt7621_pci_parse_request_of_pci_ranges(struct pci_host_bridge *host)
{
struct mt7621_pcie *pcie = pci_host_bridge_priv(host);
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node;
struct of_pci_range_parser parser;
struct resource_entry *entry;
struct of_pci_range range;
LIST_HEAD(res);
if (of_pci_range_parser_init(&parser, node)) {
dev_err(dev, "missing \"ranges\" property\n");
@ -314,14 +317,21 @@ static int mt7621_pci_parse_request_of_pci_ranges(struct mt7621_pcie *pcie)
of_pci_range_to_resource(&range, node, &pcie->io);
pcie->io.start = range.cpu_addr;
pcie->io.end = range.cpu_addr + range.size - 1;
break;
case IORESOURCE_MEM:
of_pci_range_to_resource(&range, node, &pcie->mem);
set_io_port_base(pcie->io_map_base);
break;
}
}
set_io_port_base(pcie->io_map_base);
entry = resource_list_first_type(&host->windows, IORESOURCE_MEM);
if (!entry) {
dev_err(dev, "Cannot get memory resource");
return -EINVAL;
}
pcie->mem = entry->res;
pci_add_resource(&res, &pcie->io);
pci_add_resource(&res, entry->res);
list_splice_init(&res, &host->windows);
return 0;
}
@ -641,19 +651,10 @@ static int mt7621_pcie_init_virtual_bridges(struct mt7621_pcie *pcie)
return 0;
}
static void mt7621_pcie_add_resources(struct mt7621_pcie *pcie,
struct list_head *res)
{
pci_add_resource(res, &pcie->io);
pci_add_resource(res, &pcie->mem);
}
static int mt7621_pcie_register_host(struct pci_host_bridge *host,
struct list_head *res)
static int mt7621_pcie_register_host(struct pci_host_bridge *host)
{
struct mt7621_pcie *pcie = pci_host_bridge_priv(host);
list_splice_init(res, &host->windows);
host->ops = &mt7621_pci_ops;
host->map_irq = mt7621_map_irq;
host->sysdata = pcie;
@ -672,7 +673,6 @@ static int mt7621_pci_probe(struct platform_device *pdev)
struct mt7621_pcie *pcie;
struct pci_host_bridge *bridge;
int err;
LIST_HEAD(res);
if (!dev->of_node)
return -ENODEV;
@ -696,7 +696,7 @@ static int mt7621_pci_probe(struct platform_device *pdev)
return err;
}
err = mt7621_pci_parse_request_of_pci_ranges(pcie);
err = mt7621_pci_parse_request_of_pci_ranges(bridge);
if (err) {
dev_err(dev, "Error requesting pci resources from ranges");
return err;
@ -718,9 +718,7 @@ static int mt7621_pci_probe(struct platform_device *pdev)
setup_cm_memory_region(pcie);
mt7621_pcie_add_resources(pcie, &res);
err = mt7621_pcie_register_host(bridge, &res);
err = mt7621_pcie_register_host(bridge);
if (err) {
dev_err(dev, "Error registering host\n");
return err;