[PATCH 1/2] ACPI: Combine acpi_dev_resource_address_space() and acpi_dev_resource_ext_address_space()
Bjorn Helgaas
bhelgaas at google.com
Tue Nov 29 10:43:26 PST 2016
Previously acpi_dev_resource_address_space() and
acpi_dev_resource_ext_address_space() were wrappers that called
acpi_decode_space(). We need to distinguish between Word/DWord/QWord
address descriptors and Extended address descriptors, which was impossible
in acpi_decode_space().
Fold the acpi_dev_resource_address_space() and
acpi_dev_resource_ext_address_space() functionality into
acpi_decode_space() and call the result acpi_dev_resource_address_space().
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas at google.com>
---
drivers/acpi/ioapic.c | 3 -
drivers/acpi/resource.c | 114 ++++++++++++++++------------------------
drivers/pnp/pnpacpi/rsparser.c | 3 -
include/linux/acpi.h | 2 -
4 files changed, 48 insertions(+), 74 deletions(-)
diff --git a/drivers/acpi/ioapic.c b/drivers/acpi/ioapic.c
index 6d7ce6e..6d91417 100644
--- a/drivers/acpi/ioapic.c
+++ b/drivers/acpi/ioapic.c
@@ -50,8 +50,7 @@ static acpi_status setup_res(struct acpi_resource *acpi_res, void *data)
return AE_OK;
if (!acpi_dev_resource_memory(acpi_res, res)) {
- if (acpi_dev_resource_address_space(acpi_res, &win) ||
- acpi_dev_resource_ext_address_space(acpi_res, &win))
+ if (acpi_dev_resource_address_space(acpi_res, &win))
*res = win.res;
}
if ((res->flags & IORESOURCE_PREFETCH) ||
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 56241eb..2732d39e 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -197,16 +197,54 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
}
EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
-static bool acpi_decode_space(struct resource_win *win,
- struct acpi_resource_address *addr,
- struct acpi_address64_attribute *attr)
+/**
+ * acpi_dev_resource_address_space - Extract ACPI address space information.
+ * @ares: Input ACPI resource object.
+ * @win: Output generic resource object.
+ *
+ * Check if the given ACPI resource object represents an address space resource
+ * and if that's the case, use the information in it to populate the generic
+ * resource object pointed to by @win.
+ *
+ * Return:
+ * 1) false with win->res.flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
+ * resource
+ * 3) true: valid assigned resource
+ XXX check these return values
+ */
+bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+ struct resource_win *win)
{
- u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
- bool wp = addr->info.mem.write_protect;
- u64 len = attr->address_length;
- u64 start, end, offset = 0;
+ struct acpi_resource_address *addr;
+ struct acpi_address64_attribute *attr;
+ struct acpi_resource_extended_address64 *ext_addr;
+ struct acpi_resource_address64 addr64;
+ acpi_status status;
+ u8 iodec;
+ bool wp;
+ u64 len, start, end, offset = 0;
struct resource *res = &win->res;
+ win->res.flags = 0;
+
+ if (ares->type == ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
+ ext_addr = &ares->data.ext_address64;
+ addr = (struct acpi_resource_address *)ext_addr;
+ attr = &ext_addr->address;
+ } else {
+ status = acpi_resource_to_address64(ares, &addr64);
+ if (ACPI_FAILURE(status))
+ return false;
+
+ addr = (struct acpi_resource_address *)&addr64;
+ attr = &addr64.address;
+ }
+
+ iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
+ wp = addr->info.mem.write_protect;
+ len = attr->address_length;
+
/*
* Filter out invalid descriptor according to ACPI Spec 5.0, section
* 6.4.3.5 Address Space Resource Descriptors.
@@ -264,68 +302,9 @@ static bool acpi_decode_space(struct resource_win *win,
return !(res->flags & IORESOURCE_DISABLED);
}
-
-/**
- * acpi_dev_resource_address_space - Extract ACPI address space information.
- * @ares: Input ACPI resource object.
- * @win: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an address space resource
- * and if that's the case, use the information in it to populate the generic
- * resource object pointed to by @win.
- *
- * Return:
- * 1) false with win->res.flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
- * resource
- * 3) true: valid assigned resource
- */
-bool acpi_dev_resource_address_space(struct acpi_resource *ares,
- struct resource_win *win)
-{
- struct acpi_resource_address64 addr;
-
- win->res.flags = 0;
- if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
- return false;
-
- return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
- &addr.address);
-}
EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
/**
- * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
- * @ares: Input ACPI resource object.
- * @win: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an extended address space
- * resource and if that's the case, use the information in it to populate the
- * generic resource object pointed to by @win.
- *
- * Return:
- * 1) false with win->res.flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
- * resource
- * 3) true: valid assigned resource
- */
-bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
- struct resource_win *win)
-{
- struct acpi_resource_extended_address64 *ext_addr;
-
- win->res.flags = 0;
- if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
- return false;
-
- ext_addr = &ares->data.ext_address64;
-
- return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
- &ext_addr->address);
-}
-EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
-
-/**
* acpi_dev_irq_flags - Determine IRQ resource flags.
* @triggering: Triggering type as provided by ACPI.
* @polarity: Interrupt polarity as provided by ACPI.
@@ -542,8 +521,7 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
if (acpi_dev_resource_memory(ares, res)
|| acpi_dev_resource_io(ares, res)
- || acpi_dev_resource_address_space(ares, &win)
- || acpi_dev_resource_ext_address_space(ares, &win))
+ || acpi_dev_resource_address_space(ares, &win))
return acpi_dev_new_resource_entry(&win, c);
for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 4b717c6..bc61651 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -184,8 +184,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
struct resource *r = &win.res;
int i, flags;
- if (acpi_dev_resource_address_space(res, &win)
- || acpi_dev_resource_ext_address_space(res, &win)) {
+ if (acpi_dev_resource_address_space(res, &win)) {
pnp_add_resource(dev, &win.res);
return AE_OK;
}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index ddbeda6..a06a877 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -399,8 +399,6 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res);
bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res);
bool acpi_dev_resource_address_space(struct acpi_resource *ares,
struct resource_win *win);
-bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
- struct resource_win *win);
unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
unsigned int acpi_dev_get_irq_type(int triggering, int polarity);
bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
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