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authorRob Herring <robh@kernel.org>2018-01-18 02:36:39 +0300
committerBjorn Helgaas <bhelgaas@google.com>2018-01-18 02:36:39 +0300
commit4670d610d59233b017a6ea1fa25bbf06dabbff42 (patch)
tree685348098c09162b095cfb2f9886c638e3ff402a /drivers/of
parent1291a0d5049dbc06baaaf66a9ff3f53db493b19b (diff)
downloadlinux-4670d610d59233b017a6ea1fa25bbf06dabbff42.tar.xz
PCI: Move OF-related PCI functions into PCI core
Following what has been done for other subsystems, move the remaining PCI related code out of drivers/of/ and into drivers/pci/of.c With this, we can kill a few kconfig symbols. Signed-off-by: Rob Herring <robh@kernel.org> [bhelgaas: minor whitespace, comment cleanups] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Frank Rowand <frowand.list@gmail.com>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/Kconfig16
-rw-r--r--drivers/of/Makefile2
-rw-r--r--drivers/of/address.c8
-rw-r--r--drivers/of/of_pci.c384
-rw-r--r--drivers/of/of_pci_irq.c131
5 files changed, 3 insertions, 538 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index ad9a9578f9c4..ee244c2e8c2b 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -62,10 +62,6 @@ config OF_DYNAMIC
config OF_ADDRESS
def_bool y
depends on !SPARC && HAS_IOMEM
- select OF_ADDRESS_PCI if PCI
-
-config OF_ADDRESS_PCI
- bool
config OF_IRQ
def_bool y
@@ -82,18 +78,6 @@ config OF_MDIO
help
OpenFirmware MDIO bus (Ethernet PHY) accessors
-config OF_PCI
- def_tristate PCI
- depends on PCI
- help
- OpenFirmware PCI bus accessors
-
-config OF_PCI_IRQ
- def_tristate PCI
- depends on OF_PCI && OF_IRQ
- help
- OpenFirmware PCI IRQ routing helpers
-
config OF_RESERVED_MEM
depends on OF_EARLY_FLATTREE
bool
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 63a4be62ce19..663a4af0cccd 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -10,8 +10,6 @@ obj-$(CONFIG_OF_IRQ) += irq.o
obj-$(CONFIG_OF_NET) += of_net.o
obj-$(CONFIG_OF_UNITTEST) += unittest.o
obj-$(CONFIG_OF_MDIO) += of_mdio.o
-obj-$(CONFIG_OF_PCI) += of_pci.o
-obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o
obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o
obj-$(CONFIG_OF_RESOLVE) += resolver.o
obj-$(CONFIG_OF_OVERLAY) += overlay.o
diff --git a/drivers/of/address.c b/drivers/of/address.c
index fa6cabfc3cb9..8591afbdfe99 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -96,7 +96,7 @@ static unsigned int of_bus_default_get_flags(const __be32 *addr)
return IORESOURCE_MEM;
}
-#ifdef CONFIG_OF_ADDRESS_PCI
+#ifdef CONFIG_PCI
/*
* PCI bus specific translator
*/
@@ -171,9 +171,7 @@ static int of_bus_pci_translate(__be32 *addr, u64 offset, int na)
{
return of_bus_default_translate(addr + 1, offset, na - 1);
}
-#endif /* CONFIG_OF_ADDRESS_PCI */
-#ifdef CONFIG_PCI
const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
unsigned int *flags)
{
@@ -426,7 +424,7 @@ static unsigned int of_bus_isa_get_flags(const __be32 *addr)
*/
static struct of_bus of_busses[] = {
-#ifdef CONFIG_OF_ADDRESS_PCI
+#ifdef CONFIG_PCI
/* PCI */
{
.name = "pci",
@@ -437,7 +435,7 @@ static struct of_bus of_busses[] = {
.translate = of_bus_pci_translate,
.get_flags = of_bus_pci_get_flags,
},
-#endif /* CONFIG_OF_ADDRESS_PCI */
+#endif /* CONFIG_PCI */
/* ISA */
{
.name = "isa",
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
deleted file mode 100644
index a7b1cb6c2f65..000000000000
--- a/drivers/of/of_pci.c
+++ /dev/null
@@ -1,384 +0,0 @@
-#define pr_fmt(fmt) "OF: PCI: " fmt
-
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/of_pci.h>
-#include <linux/slab.h>
-
-static inline int __of_pci_pci_compare(struct device_node *node,
- unsigned int data)
-{
- int devfn;
-
- devfn = of_pci_get_devfn(node);
- if (devfn < 0)
- return 0;
-
- return devfn == data;
-}
-
-struct device_node *of_pci_find_child_device(struct device_node *parent,
- unsigned int devfn)
-{
- struct device_node *node, *node2;
-
- for_each_child_of_node(parent, node) {
- if (__of_pci_pci_compare(node, devfn))
- return node;
- /*
- * Some OFs create a parent node "multifunc-device" as
- * a fake root for all functions of a multi-function
- * device we go down them as well.
- */
- if (!strcmp(node->name, "multifunc-device")) {
- for_each_child_of_node(node, node2) {
- if (__of_pci_pci_compare(node2, devfn)) {
- of_node_put(node);
- return node2;
- }
- }
- }
- }
- return NULL;
-}
-EXPORT_SYMBOL_GPL(of_pci_find_child_device);
-
-/**
- * of_pci_get_devfn() - Get device and function numbers for a device node
- * @np: device node
- *
- * Parses a standard 5-cell PCI resource and returns an 8-bit value that can
- * be passed to the PCI_SLOT() and PCI_FUNC() macros to extract the device
- * and function numbers respectively. On error a negative error code is
- * returned.
- */
-int of_pci_get_devfn(struct device_node *np)
-{
- u32 reg[5];
- int error;
-
- error = of_property_read_u32_array(np, "reg", reg, ARRAY_SIZE(reg));
- if (error)
- return error;
-
- return (reg[0] >> 8) & 0xff;
-}
-EXPORT_SYMBOL_GPL(of_pci_get_devfn);
-
-/**
- * of_pci_parse_bus_range() - parse the bus-range property of a PCI device
- * @node: device node
- * @res: address to a struct resource to return the bus-range
- *
- * Returns 0 on success or a negative error-code on failure.
- */
-int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
-{
- u32 bus_range[2];
- int error;
-
- error = of_property_read_u32_array(node, "bus-range", bus_range,
- ARRAY_SIZE(bus_range));
- if (error)
- return error;
-
- res->name = node->name;
- res->start = bus_range[0];
- res->end = bus_range[1];
- res->flags = IORESOURCE_BUS;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
-
-/**
- * This function will try to obtain the host bridge domain number by
- * finding a property called "linux,pci-domain" of the given device node.
- *
- * @node: device tree node with the domain information
- *
- * Returns the associated domain number from DT in the range [0-0xffff], or
- * a negative value if the required property is not found.
- */
-int of_get_pci_domain_nr(struct device_node *node)
-{
- u32 domain;
- int error;
-
- error = of_property_read_u32(node, "linux,pci-domain", &domain);
- if (error)
- return error;
-
- return (u16)domain;
-}
-EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);
-
-/**
- * This function will try to find the limitation of link speed by finding
- * a property called "max-link-speed" of the given device node.
- *
- * @node: device tree node with the max link speed information
- *
- * Returns the associated max link speed from DT, or a negative value if the
- * required property is not found or is invalid.
- */
-int of_pci_get_max_link_speed(struct device_node *node)
-{
- u32 max_link_speed;
-
- if (of_property_read_u32(node, "max-link-speed", &max_link_speed) ||
- max_link_speed > 4)
- return -EINVAL;
-
- return max_link_speed;
-}
-EXPORT_SYMBOL_GPL(of_pci_get_max_link_speed);
-
-/**
- * of_pci_check_probe_only - Setup probe only mode if linux,pci-probe-only
- * is present and valid
- */
-void of_pci_check_probe_only(void)
-{
- u32 val;
- int ret;
-
- ret = of_property_read_u32(of_chosen, "linux,pci-probe-only", &val);
- if (ret) {
- if (ret == -ENODATA || ret == -EOVERFLOW)
- pr_warn("linux,pci-probe-only without valid value, ignoring\n");
- return;
- }
-
- if (val)
- pci_add_flags(PCI_PROBE_ONLY);
- else
- pci_clear_flags(PCI_PROBE_ONLY);
-
- pr_info("PROBE_ONLY %sabled\n", val ? "en" : "dis");
-}
-EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
-
-#if defined(CONFIG_OF_ADDRESS)
-/**
- * of_pci_get_host_bridge_resources - Parse PCI host bridge resources from DT
- * @dev: device node of the host bridge having the range property
- * @busno: bus number associated with the bridge root bus
- * @bus_max: maximum number of buses for this bridge
- * @resources: list where the range of resources will be added after DT parsing
- * @io_base: pointer to a variable that will contain on return the physical
- * address for the start of the I/O range. Can be NULL if the caller doesn't
- * expect IO ranges to be present in the device tree.
- *
- * It is the caller's job to free the @resources list.
- *
- * This function will parse the "ranges" property of a PCI host bridge device
- * node and setup the resource mapping based on its content. It is expected
- * that the property conforms with the Power ePAPR document.
- *
- * It returns zero if the range parsing has been successful or a standard error
- * value if it failed.
- */
-int of_pci_get_host_bridge_resources(struct device_node *dev,
- unsigned char busno, unsigned char bus_max,
- struct list_head *resources, resource_size_t *io_base)
-{
- struct resource_entry *window;
- struct resource *res;
- struct resource *bus_range;
- struct of_pci_range range;
- struct of_pci_range_parser parser;
- char range_type[4];
- int err;
-
- if (io_base)
- *io_base = (resource_size_t)OF_BAD_ADDR;
-
- bus_range = kzalloc(sizeof(*bus_range), GFP_KERNEL);
- if (!bus_range)
- return -ENOMEM;
-
- pr_info("host bridge %pOF ranges:\n", dev);
-
- err = of_pci_parse_bus_range(dev, bus_range);
- if (err) {
- bus_range->start = busno;
- bus_range->end = bus_max;
- bus_range->flags = IORESOURCE_BUS;
- pr_info(" No bus range found for %pOF, using %pR\n",
- dev, bus_range);
- } else {
- if (bus_range->end > bus_range->start + bus_max)
- bus_range->end = bus_range->start + bus_max;
- }
- pci_add_resource(resources, bus_range);
-
- /* Check for ranges property */
- err = of_pci_range_parser_init(&parser, dev);
- if (err)
- goto parse_failed;
-
- pr_debug("Parsing ranges property...\n");
- for_each_of_pci_range(&parser, &range) {
- /* Read next ranges element */
- if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_IO)
- snprintf(range_type, 4, " IO");
- else if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_MEM)
- snprintf(range_type, 4, "MEM");
- else
- snprintf(range_type, 4, "err");
- pr_info(" %s %#010llx..%#010llx -> %#010llx\n", range_type,
- range.cpu_addr, range.cpu_addr + range.size - 1,
- range.pci_addr);
-
- /*
- * If we failed translation or got a zero-sized region
- * then skip this range
- */
- if (range.cpu_addr == OF_BAD_ADDR || range.size == 0)
- continue;
-
- res = kzalloc(sizeof(struct resource), GFP_KERNEL);
- if (!res) {
- err = -ENOMEM;
- goto parse_failed;
- }
-
- err = of_pci_range_to_resource(&range, dev, res);
- if (err) {
- kfree(res);
- continue;
- }
-
- if (resource_type(res) == IORESOURCE_IO) {
- if (!io_base) {
- pr_err("I/O range found for %pOF. Please provide an io_base pointer to save CPU base address\n",
- dev);
- err = -EINVAL;
- goto conversion_failed;
- }
- if (*io_base != (resource_size_t)OF_BAD_ADDR)
- pr_warn("More than one I/O resource converted for %pOF. CPU base address for old range lost!\n",
- dev);
- *io_base = range.cpu_addr;
- }
-
- pci_add_resource_offset(resources, res, res->start - range.pci_addr);
- }
-
- return 0;
-
-conversion_failed:
- kfree(res);
-parse_failed:
- resource_list_for_each_entry(window, resources)
- kfree(window->res);
- pci_free_resource_list(resources);
- return err;
-}
-EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);
-#endif /* CONFIG_OF_ADDRESS */
-
-/**
- * of_pci_map_rid - Translate a requester ID through a downstream mapping.
- * @np: root complex device node.
- * @rid: PCI requester ID to map.
- * @map_name: property name of the map to use.
- * @map_mask_name: optional property name of the mask to use.
- * @target: optional pointer to a target device node.
- * @id_out: optional pointer to receive the translated ID.
- *
- * Given a PCI requester ID, look up the appropriate implementation-defined
- * platform ID and/or the target device which receives transactions on that
- * ID, as per the "iommu-map" and "msi-map" bindings. Either of @target or
- * @id_out may be NULL if only the other is required. If @target points to
- * a non-NULL device node pointer, only entries targeting that node will be
- * matched; if it points to a NULL value, it will receive the device node of
- * the first matching target phandle, with a reference held.
- *
- * Return: 0 on success or a standard error code on failure.
- */
-int of_pci_map_rid(struct device_node *np, u32 rid,
- const char *map_name, const char *map_mask_name,
- struct device_node **target, u32 *id_out)
-{
- u32 map_mask, masked_rid;
- int map_len;
- const __be32 *map = NULL;
-
- if (!np || !map_name || (!target && !id_out))
- return -EINVAL;
-
- map = of_get_property(np, map_name, &map_len);
- if (!map) {
- if (target)
- return -ENODEV;
- /* Otherwise, no map implies no translation */
- *id_out = rid;
- return 0;
- }
-
- if (!map_len || map_len % (4 * sizeof(*map))) {
- pr_err("%pOF: Error: Bad %s length: %d\n", np,
- map_name, map_len);
- return -EINVAL;
- }
-
- /* The default is to select all bits. */
- map_mask = 0xffffffff;
-
- /*
- * Can be overridden by "{iommu,msi}-map-mask" property.
- * If of_property_read_u32() fails, the default is used.
- */
- if (map_mask_name)
- of_property_read_u32(np, map_mask_name, &map_mask);
-
- masked_rid = map_mask & rid;
- for ( ; map_len > 0; map_len -= 4 * sizeof(*map), map += 4) {
- struct device_node *phandle_node;
- u32 rid_base = be32_to_cpup(map + 0);
- u32 phandle = be32_to_cpup(map + 1);
- u32 out_base = be32_to_cpup(map + 2);
- u32 rid_len = be32_to_cpup(map + 3);
-
- if (rid_base & ~map_mask) {
- pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores rid-base (0x%x)\n",
- np, map_name, map_name,
- map_mask, rid_base);
- return -EFAULT;
- }
-
- if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
- continue;
-
- phandle_node = of_find_node_by_phandle(phandle);
- if (!phandle_node)
- return -ENODEV;
-
- if (target) {
- if (*target)
- of_node_put(phandle_node);
- else
- *target = phandle_node;
-
- if (*target != phandle_node)
- continue;
- }
-
- if (id_out)
- *id_out = masked_rid - rid_base + out_base;
-
- pr_debug("%pOF: %s, using mask %08x, rid-base: %08x, out-base: %08x, length: %08x, rid: %08x -> %08x\n",
- np, map_name, map_mask, rid_base, out_base,
- rid_len, rid, masked_rid - rid_base + out_base);
- return 0;
- }
-
- pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",
- np, map_name, rid, target && *target ? *target : NULL);
- return -EFAULT;
-}
diff --git a/drivers/of/of_pci_irq.c b/drivers/of/of_pci_irq.c
deleted file mode 100644
index 3a05568f65df..000000000000
--- a/drivers/of/of_pci_irq.c
+++ /dev/null
@@ -1,131 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/of_pci.h>
-#include <linux/of_irq.h>
-#include <linux/export.h>
-
-/**
- * of_irq_parse_pci - Resolve the interrupt for a PCI device
- * @pdev: the device whose interrupt is to be resolved
- * @out_irq: structure of_irq filled by this function
- *
- * This function resolves the PCI interrupt for a given PCI device. If a
- * device-node exists for a given pci_dev, it will use normal OF tree
- * walking. If not, it will implement standard swizzling and walk up the
- * PCI tree until an device-node is found, at which point it will finish
- * resolving using the OF tree walking.
- */
-int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
-{
- struct device_node *dn, *ppnode;
- struct pci_dev *ppdev;
- __be32 laddr[3];
- u8 pin;
- int rc;
-
- /* Check if we have a device node, if yes, fallback to standard
- * device tree parsing
- */
- dn = pci_device_to_OF_node(pdev);
- if (dn) {
- rc = of_irq_parse_one(dn, 0, out_irq);
- if (!rc)
- return rc;
- }
-
- /* Ok, we don't, time to have fun. Let's start by building up an
- * interrupt spec. we assume #interrupt-cells is 1, which is standard
- * for PCI. If you do different, then don't use that routine.
- */
- rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
- if (rc != 0)
- goto err;
- /* No pin, exit with no error message. */
- if (pin == 0)
- return -ENODEV;
-
- /* Now we walk up the PCI tree */
- for (;;) {
- /* Get the pci_dev of our parent */
- ppdev = pdev->bus->self;
-
- /* Ouch, it's a host bridge... */
- if (ppdev == NULL) {
- ppnode = pci_bus_to_OF_node(pdev->bus);
-
- /* No node for host bridge ? give up */
- if (ppnode == NULL) {
- rc = -EINVAL;
- goto err;
- }
- } else {
- /* We found a P2P bridge, check if it has a node */
- ppnode = pci_device_to_OF_node(ppdev);
- }
-
- /* Ok, we have found a parent with a device-node, hand over to
- * the OF parsing code.
- * We build a unit address from the linux device to be used for
- * resolution. Note that we use the linux bus number which may
- * not match your firmware bus numbering.
- * Fortunately, in most cases, interrupt-map-mask doesn't
- * include the bus number as part of the matching.
- * You should still be careful about that though if you intend
- * to rely on this function (you ship a firmware that doesn't
- * create device nodes for all PCI devices).
- */
- if (ppnode)
- break;
-
- /* We can only get here if we hit a P2P bridge with no node,
- * let's do standard swizzling and try again
- */
- pin = pci_swizzle_interrupt_pin(pdev, pin);
- pdev = ppdev;
- }
-
- out_irq->np = ppnode;
- out_irq->args_count = 1;
- out_irq->args[0] = pin;
- laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
- laddr[1] = laddr[2] = cpu_to_be32(0);
- rc = of_irq_parse_raw(laddr, out_irq);
- if (rc)
- goto err;
- return 0;
-err:
- if (rc == -ENOENT) {
- dev_warn(&pdev->dev,
- "%s: no interrupt-map found, INTx interrupts not available\n",
- __func__);
- pr_warn_once("%s: possibly some PCI slots don't have level triggered interrupts capability\n",
- __func__);
- } else {
- dev_err(&pdev->dev, "%s: failed with rc=%d\n", __func__, rc);
- }
- return rc;
-}
-EXPORT_SYMBOL_GPL(of_irq_parse_pci);
-
-/**
- * of_irq_parse_and_map_pci() - Decode a PCI irq from the device tree and map to a virq
- * @dev: The pci device needing an irq
- * @slot: PCI slot number; passed when used as map_irq callback. Unused
- * @pin: PCI irq pin number; passed when used as map_irq callback. Unused
- *
- * @slot and @pin are unused, but included in the function so that this
- * function can be used directly as the map_irq callback to
- * pci_assign_irq() and struct pci_host_bridge.map_irq pointer
- */
-int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- struct of_phandle_args oirq;
- int ret;
-
- ret = of_irq_parse_pci(dev, &oirq);
- if (ret)
- return 0; /* Proper return code 0 == NO_IRQ */
-
- return irq_create_of_mapping(&oirq);
-}
-EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci);
-