Commit 85e1f221 authored by Rob Herring's avatar Rob Herring
Browse files

Merge branch 'dt/ranges-rework' into dt/next

parents 689e16ed 9d55bebd

arch/microblaze/pci/pci-common.c

+1 −6
Original line number Diff line number Diff line
@@ -433,10 +433,6 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose, 
	pr_debug("Parsing ranges property...\n");

	for_each_of_pci_range(&parser, &range) {

		/* Read next ranges element */

		pr_debug("pci_space: 0x%08x pci_addr:0x%016llx ",

				range.pci_space, range.pci_addr);

		pr_debug("cpu_addr:0x%016llx size:0x%016llx\n",

					range.cpu_addr, range.size);



		/* If we failed translation or got a zero-sized region

		 * (some FW try to feed us with non sensical zero sized regions
@@ -486,7 +482,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose, 
			pr_info(" MEM 0x%016llx..0x%016llx -> 0x%016llx %s\n",

				range.cpu_addr, range.cpu_addr + range.size - 1,

				range.pci_addr,

				(range.pci_space & 0x40000000) ?

				(range.flags & IORESOURCE_PREFETCH) ?

				"Prefetch" : "");



			/* We support only 3 memory ranges */
@@ -1121,4 +1117,3 @@ int early_find_capability(struct pci_controller *hose, int bus, int devfn, 
{

	return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);

}

arch/powerpc/kernel/pci-common.c

+1 −1
Original line number Diff line number Diff line
@@ -728,7 +728,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose, 
			       " MEM 0x%016llx..0x%016llx -> 0x%016llx %s\n",

			       range.cpu_addr, range.cpu_addr + range.size - 1,

			       range.pci_addr,

			       (range.pci_space & 0x40000000) ?

			       (range.flags & IORESOURCE_PREFETCH) ?

			       "Prefetch" : "");



			/* We support only 3 memory ranges */

drivers/of/address.c

+146 −127
Original line number Diff line number Diff line
@@ -100,6 +100,28 @@ static unsigned int of_bus_default_get_flags(const __be32 *addr) 
	return IORESOURCE_MEM;

}



static unsigned int of_bus_pci_get_flags(const __be32 *addr)

{

	unsigned int flags = 0;

	u32 w = be32_to_cpup(addr);



	if (!IS_ENABLED(CONFIG_PCI))

		return 0;



	switch((w >> 24) & 0x03) {

	case 0x01:

		flags |= IORESOURCE_IO;

		break;

	case 0x02: /* 32 bits */

	case 0x03: /* 64 bits */

		flags |= IORESOURCE_MEM;

		break;

	}

	if (w & 0x40000000)

		flags |= IORESOURCE_PREFETCH;

	return flags;

}



#ifdef CONFIG_PCI

/*

 * PCI bus specific translator
@@ -125,25 +147,6 @@ static void of_bus_pci_count_cells(struct device_node *np, 
		*sizec = 2;

}



static unsigned int of_bus_pci_get_flags(const __be32 *addr)

{

	unsigned int flags = 0;

	u32 w = be32_to_cpup(addr);



	switch((w >> 24) & 0x03) {

	case 0x01:

		flags |= IORESOURCE_IO;

		break;

	case 0x02: /* 32 bits */

	case 0x03: /* 64 bits */

		flags |= IORESOURCE_MEM;

		break;

	}

	if (w & 0x40000000)

		flags |= IORESOURCE_PREFETCH;

	return flags;

}



static u64 of_bus_pci_map(__be32 *addr, const __be32 *range, int na, int ns,

		int pna)

{
@@ -234,93 +237,6 @@ int of_pci_address_to_resource(struct device_node *dev, int bar, 
}

EXPORT_SYMBOL_GPL(of_pci_address_to_resource);



static int parser_init(struct of_pci_range_parser *parser,

			struct device_node *node, const char *name)

{

	const int na = 3, ns = 2;

	int rlen;



	parser->node = node;

	parser->pna = of_n_addr_cells(node);

	parser->np = parser->pna + na + ns;

	parser->dma = !strcmp(name, "dma-ranges");



	parser->range = of_get_property(node, name, &rlen);

	if (parser->range == NULL)

		return -ENOENT;



	parser->end = parser->range + rlen / sizeof(__be32);



	return 0;

}



int of_pci_range_parser_init(struct of_pci_range_parser *parser,

				struct device_node *node)

{

	return parser_init(parser, node, "ranges");

}

EXPORT_SYMBOL_GPL(of_pci_range_parser_init);



int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,

				struct device_node *node)

{

	return parser_init(parser, node, "dma-ranges");

}

EXPORT_SYMBOL_GPL(of_pci_dma_range_parser_init);



struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,

						struct of_pci_range *range)

{

	const int na = 3, ns = 2;



	if (!range)

		return NULL;



	if (!parser->range || parser->range + parser->np > parser->end)

		return NULL;



	range->pci_space = be32_to_cpup(parser->range);

	range->flags = of_bus_pci_get_flags(parser->range);

	range->pci_addr = of_read_number(parser->range + 1, ns);

	if (parser->dma)

		range->cpu_addr = of_translate_dma_address(parser->node,

				parser->range + na);

	else

		range->cpu_addr = of_translate_address(parser->node,

				parser->range + na);

	range->size = of_read_number(parser->range + parser->pna + na, ns);



	parser->range += parser->np;



	/* Now consume following elements while they are contiguous */

	while (parser->range + parser->np <= parser->end) {

		u32 flags;

		u64 pci_addr, cpu_addr, size;



		flags = of_bus_pci_get_flags(parser->range);

		pci_addr = of_read_number(parser->range + 1, ns);

		if (parser->dma)

			cpu_addr = of_translate_dma_address(parser->node,

					parser->range + na);

		else

			cpu_addr = of_translate_address(parser->node,

					parser->range + na);

		size = of_read_number(parser->range + parser->pna + na, ns);



		if (flags != range->flags)

			break;

		if (pci_addr != range->pci_addr + range->size ||

		    cpu_addr != range->cpu_addr + range->size)

			break;



		range->size += size;

		parser->range += parser->np;

	}



	return range;

}

EXPORT_SYMBOL_GPL(of_pci_range_parser_one);



/*

 * of_pci_range_to_resource - Create a resource from an of_pci_range

 * @range:	the PCI range that describes the resource
@@ -775,6 +691,101 @@ const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, 
}

EXPORT_SYMBOL(of_get_address);



static int parser_init(struct of_pci_range_parser *parser,

			struct device_node *node, const char *name)

{

	int rlen;



	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->range = of_get_property(node, name, &rlen);

	if (parser->range == NULL)

		return -ENOENT;



	parser->end = parser->range + rlen / sizeof(__be32);



	return 0;

}



int of_pci_range_parser_init(struct of_pci_range_parser *parser,

				struct device_node *node)

{

	return parser_init(parser, node, "ranges");

}

EXPORT_SYMBOL_GPL(of_pci_range_parser_init);



int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,

				struct device_node *node)

{

	return parser_init(parser, node, "dma-ranges");

}

EXPORT_SYMBOL_GPL(of_pci_dma_range_parser_init);

#define of_dma_range_parser_init of_pci_dma_range_parser_init



struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,

						struct of_pci_range *range)

{

	int na = parser->na;

	int ns = parser->ns;

	int np = parser->pna + na + ns;



	if (!range)

		return NULL;



	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->pci_addr = of_read_number(parser->range, na);



	if (parser->dma)

		range->cpu_addr = of_translate_dma_address(parser->node,

				parser->range + na);

	else

		range->cpu_addr = of_translate_address(parser->node,

				parser->range + na);

	range->size = of_read_number(parser->range + parser->pna + na, ns);



	parser->range += np;



	/* Now consume following elements while they are contiguous */

	while (parser->range + np <= parser->end) {

		u32 flags = 0;

		u64 pci_addr, cpu_addr, size;



		if (parser->na == 3)

			flags = of_bus_pci_get_flags(parser->range);

		pci_addr = of_read_number(parser->range, na);

		if (parser->dma)

			cpu_addr = of_translate_dma_address(parser->node,

					parser->range + na);

		else

			cpu_addr = of_translate_address(parser->node,

					parser->range + na);

		size = of_read_number(parser->range + parser->pna + na, ns);



		if (flags != range->flags)

			break;

		if (pci_addr != range->pci_addr + range->size ||

		    cpu_addr != range->cpu_addr + range->size)

			break;



		range->size += size;

		parser->range += np;

	}



	return range;

}

EXPORT_SYMBOL_GPL(of_pci_range_parser_one);



static u64 of_translate_ioport(struct device_node *dev, const __be32 *in_addr,

			u64 size)

{
@@ -928,10 +939,12 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz 
{

	struct device_node *node = of_node_get(np);

	const __be32 *ranges = NULL;

	int len, naddr, nsize, pna;

	int len;

	int ret = 0;

	bool found_dma_ranges = false;

	u64 dmaaddr;

	struct of_range_parser parser;

	struct of_range range;

	u64 dma_start = U64_MAX, dma_end = 0, dma_offset = 0;



	while (node) {

		ranges = of_get_property(node, "dma-ranges", &len);
@@ -956,32 +969,38 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz 
		goto out;

	}



	naddr = of_bus_n_addr_cells(node);

	nsize = of_bus_n_size_cells(node);

	pna = of_n_addr_cells(node);

	if ((len / sizeof(__be32)) % (pna + naddr + nsize)) {

		ret = -EINVAL;

		goto out;

	of_dma_range_parser_init(&parser, node);



	for_each_of_range(&parser, &range) {

		pr_debug("dma_addr(%llx) cpu_addr(%llx) size(%llx)\n",

			 range.bus_addr, range.cpu_addr, range.size);



		if (dma_offset && range.cpu_addr - range.bus_addr != dma_offset) {

			pr_warn("Can't handle multiple dma-ranges with different offsets on node(%pOF)\n", node);

			/* Don't error out as we'd break some existing DTs */

			continue;

		}

		dma_offset = range.cpu_addr - range.bus_addr;



	/* dma-ranges format:

	 * DMA addr	: naddr cells

	 * CPU addr	: pna cells

	 * size		: nsize cells

	 */

	dmaaddr = of_read_number(ranges, naddr);

	*paddr = of_translate_dma_address(node, ranges + naddr);

	if (*paddr == OF_BAD_ADDR) {

		pr_err("translation of DMA address(%llx) to CPU address failed node(%pOF)\n",

		       dmaaddr, np);

		/* Take lower and upper limits */

		if (range.bus_addr < dma_start)

			dma_start = range.bus_addr;

		if (range.bus_addr + range.size > dma_end)

			dma_end = range.bus_addr + range.size;

	}



	if (dma_start >= dma_end) {

		ret = -EINVAL;

		pr_debug("Invalid DMA ranges configuration on node(%pOF)\n",

			 node);

		goto out;

	}

	*dma_addr = dmaaddr;



	*size = of_read_number(ranges + naddr + pna, nsize);

	*dma_addr = dma_start;

	*size = dma_end - dma_start;

	*paddr = dma_start + dma_offset;



	pr_debug("dma_addr(%llx) cpu_addr(%llx) size(%llx)\n",

	pr_debug("final: dma_addr(%llx) cpu_addr(%llx) size(%llx)\n",

		 *dma_addr, *paddr, *size);



out:

include/linux/of_address.h

+9 −4
Original line number Diff line number Diff line
@@ -10,21 +10,27 @@ struct of_pci_range_parser { 
	struct device_node *node;

	const __be32 *range;

	const __be32 *end;

	int np;

	int na;

	int ns;

	int pna;

	bool dma;

};

#define of_range_parser of_pci_range_parser



struct of_pci_range {

	u32 pci_space;

	union {

		u64 pci_addr;

		u64 bus_addr;

	};

	u64 cpu_addr;

	u64 size;

	u32 flags;

};

#define of_range of_pci_range



#define for_each_of_pci_range(parser, range) \

	for (; of_pci_range_parser_one(parser, range);)

#define for_each_of_range for_each_of_pci_range



/* Translate a DMA address from device space to CPU space */

extern u64 of_translate_dma_address(struct device_node *dev,
@@ -143,4 +149,3 @@ static inline int of_pci_range_to_resource(struct of_pci_range *range, 
#endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */



#endif /* __OF_ADDRESS_H */

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