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of_address: Add bus type match for pci ranges parser

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So the parser can be used to parse range property of ISA bus.

As they're all using PCI-like method of range property, there is no need
start a new parser.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang 2020-07-28 23:36:55 +08:00 committed by Thomas Bogendoerfer
parent aa35a5eee5
commit 2f96593ecc
2 changed files with 21 additions and 12 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

29
drivers/of/address.c
View file

@ -49,6 +49,7 @@ struct of_bus {
u64 (*map)(__be32 *addr, const __be32 *range,
int na, int ns, int pna);
int (*translate)(__be32 *addr, u64 offset, int na);
bool has_flags;
unsigned int (*get_flags)(const __be32 *addr);
};
@ -364,6 +365,7 @@ static struct of_bus of_busses[] = {
.count_cells = of_bus_pci_count_cells,
.map = of_bus_pci_map,
.translate = of_bus_pci_translate,
.has_flags = true,
.get_flags = of_bus_pci_get_flags,
},
#endif /* CONFIG_PCI */
@ -375,6 +377,7 @@ static struct of_bus of_busses[] = {
.count_cells = of_bus_isa_count_cells,
.map = of_bus_isa_map,
.translate = of_bus_isa_translate,
.has_flags = true,
.get_flags = of_bus_isa_get_flags,
},
/* Default */
@ -698,9 +701,10 @@ static int parser_init(struct of_pci_range_parser *parser,
parser->node = node;
parser->pna = of_n_addr_cells(node);
parser->na = of_bus_n_addr_cells(node);
parser->ns = of_bus_n_size_cells(node);
parser->dma = !strcmp(name, "dma-ranges");
parser->bus = of_match_bus(node);
parser->bus->count_cells(parser->node, &parser->na, &parser->ns);
parser->range = of_get_property(node, name, &rlen);
if (parser->range == NULL)
@ -732,6 +736,7 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
int na = parser->na;
int ns = parser->ns;
int np = parser->pna + na + ns;
int busflag_na = 0;
if (!range)
return NULL;
@ -739,12 +744,13 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
if (!parser->range || parser->range + np > parser->end)
return NULL;
if (parser->na == 3)
range->flags = of_bus_pci_get_flags(parser->range);
else
range->flags = 0;
range->flags = parser->bus->get_flags(parser->range);
range->pci_addr = of_read_number(parser->range, na);
/* A extra cell for resource flags */
if (parser->bus->has_flags)
busflag_na = 1;
range->bus_addr = of_read_number(parser->range + busflag_na, na - busflag_na);
if (parser->dma)
range->cpu_addr = of_translate_dma_address(parser->node,
@ -759,11 +765,10 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
/* Now consume following elements while they are contiguous */
while (parser->range + np <= parser->end) {
u32 flags = 0;
u64 pci_addr, cpu_addr, size;
u64 bus_addr, cpu_addr, size;
if (parser->na == 3)
flags = of_bus_pci_get_flags(parser->range);
pci_addr = of_read_number(parser->range, na);
flags = parser->bus->get_flags(parser->range);
bus_addr = of_read_number(parser->range + busflag_na, na - busflag_na);
if (parser->dma)
cpu_addr = of_translate_dma_address(parser->node,
parser->range + na);
@ -774,7 +779,7 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
if (flags != range->flags)
break;
if (pci_addr != range->pci_addr + range->size ||
if (bus_addr != range->bus_addr + range->size ||
cpu_addr != range->cpu_addr + range->size)
break;

4
include/linux/of_address.h
View file

@ -6,8 +6,11 @@
#include <linux/of.h>
#include <linux/io.h>
struct of_bus;
struct of_pci_range_parser {
struct device_node *node;
struct of_bus *bus;
const __be32 *range;
const __be32 *end;
int na;
@ -119,6 +122,7 @@ static inline void __iomem *of_iomap(struct device_node *device, int index)
return NULL;
}
#endif
#define of_range_parser_init of_pci_range_parser_init
#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,