[Patch v4 13/23] ACPI: Return translation offset when parsing ACPI address space resources

Jiang Liu
2015-02-05T05:43:05Z

Change function acpi_dev_resource_address_space() and
acpi_dev_resource_ext_address_space() to return address space
translation offset.

It's based on a patch from Yinghai Lu <yinghai@kernel.org>.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
drivers/acpi/resource.c | 58 ++++++++++++++++++++++------------------
drivers/pnp/pnpacpi/rsparser.c | 29 ++++++++++----------
include/linux/acpi.h | 9 +++++--
3 files changed, 54 insertions(+), 42 deletions(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 57891a621b96..c902c8eece81 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -184,13 +184,14 @@ 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 *res,
+static bool acpi_decode_space(struct resource_win *win,
struct acpi_resource_address *addr,
struct acpi_address64_attribute *attr)
{
u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
bool wp = addr->info.mem.write_protect;
u64 len = attr->address_length;
+ struct resource *res = &win->res;

/*
* Filter out invalid descriptor according to ACPI Spec 5.0, section
@@ -218,6 +219,8 @@ static bool acpi_decode_space(struct resource *res,
return false;
}

+ win->offset = attr->translation_offset;
+
if (addr->producer_consumer == ACPI_PRODUCER)
res->flags |= IORESOURCE_WINDOW;

@@ -230,27 +233,28 @@ static bool acpi_decode_space(struct resource *res,
/**
* acpi_dev_resource_address_space - Extract ACPI address space information.
* @ares: Input ACPI resource object.
- * @res: Output generic 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 @res.
+ * resource object pointed to by @win.
*
* Return:
- * 1) false with res->flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 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 *res)
+ struct resource_win *win)
{
struct acpi_resource_address64 addr;

- res->flags = 0;
+ win->res.flags = 0;
if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
return false;

- return acpi_decode_space(res, (struct acpi_resource_address *)&addr,
+ return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
&addr.address);
}
EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
@@ -258,29 +262,30 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
/**
* acpi_dev_resource_ext_address_space - Extract ACPI address space information.
* @ares: Input ACPI resource object.
- * @res: Output generic 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 @res.
+ * generic resource object pointed to by @win.
*
* Return:
- * 1) false with res->flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 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 *res)
+ struct resource_win *win)
{
struct acpi_resource_extended_address64 *ext_addr;

- res->flags = 0;
+ win->res.flags = 0;
if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
return false;

ext_addr = &ares->data.ext_address64;

- return acpi_decode_space(res, (struct acpi_resource_address *)ext_addr,
+ return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
&ext_addr->address);
}
EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
@@ -441,7 +446,7 @@ struct res_proc_context {
int error;
};

-static acpi_status acpi_dev_new_resource_entry(struct resource *r,
+static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
struct res_proc_context *c)
{
struct resource_list_entry *rentry;
@@ -451,7 +456,7 @@ static acpi_status acpi_dev_new_resource_entry(struct resource *r,
c->error = -ENOMEM;
return AE_NO_MEMORY;
}
- rentry->res = *r;
+ rentry->res = win->res;
list_add_tail(&rentry->node, c->list);
c->count++;
return AE_OK;
@@ -461,7 +466,8 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
void *context)
{
struct res_proc_context *c = context;
- struct resource r;
+ struct resource_win win;
+ struct resource *res = &win.res;
int i;

if (c->preproc) {
@@ -476,18 +482,18 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
}
}

- memset(&r, 0, sizeof(r));
+ memset(&win, 0, sizeof(win));

- if (acpi_dev_resource_memory(ares, &r)
- || acpi_dev_resource_io(ares, &r)
- || acpi_dev_resource_address_space(ares, &r)
- || acpi_dev_resource_ext_address_space(ares, &r))
- return acpi_dev_new_resource_entry(&r, c);
+ 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))
+ return acpi_dev_new_resource_entry(&win, c);

- for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) {
+ for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
acpi_status status;

- status = acpi_dev_new_resource_entry(&r, c);
+ status = acpi_dev_new_resource_entry(&win, c);
if (ACPI_FAILURE(status))
return status;
}
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 2d9bc789af0f..ff0356fb378f 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -180,20 +180,21 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
struct pnp_dev *dev = data;
struct acpi_resource_dma *dma;
struct acpi_resource_vendor_typed *vendor_typed;
- struct resource r = {0};
+ struct resource_win win = {{0}, 0};
+ struct resource *r = &win.res;
int i, flags;

- if (acpi_dev_resource_address_space(res, &r)
- || acpi_dev_resource_ext_address_space(res, &r)) {
- pnp_add_resource(dev, &r);
+ if (acpi_dev_resource_address_space(res, &win)
+ || acpi_dev_resource_ext_address_space(res, &win)) {
+ pnp_add_resource(dev, &win.res);
return AE_OK;
}

- r.flags = 0;
- if (acpi_dev_resource_interrupt(res, 0, &r)) {
- pnpacpi_add_irqresource(dev, &r);
- for (i = 1; acpi_dev_resource_interrupt(res, i, &r); i++)
- pnpacpi_add_irqresource(dev, &r);
+ r->flags = 0;
+ if (acpi_dev_resource_interrupt(res, 0, r)) {
+ pnpacpi_add_irqresource(dev, r);
+ for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++)
+ pnpacpi_add_irqresource(dev, r);

if (i > 1) {
/*
@@ -209,7 +210,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
}
}
return AE_OK;
- } else if (r.flags & IORESOURCE_DISABLED) {
+ } else if (r->flags & IORESOURCE_DISABLED) {
pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
return AE_OK;
}
@@ -218,13 +219,13 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
case ACPI_RESOURCE_TYPE_MEMORY24:
case ACPI_RESOURCE_TYPE_MEMORY32:
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- if (acpi_dev_resource_memory(res, &r))
- pnp_add_resource(dev, &r);
+ if (acpi_dev_resource_memory(res, r))
+ pnp_add_resource(dev, r);
break;
case ACPI_RESOURCE_TYPE_IO:
case ACPI_RESOURCE_TYPE_FIXED_IO:
- if (acpi_dev_resource_io(res, &r))
- pnp_add_resource(dev, &r);
+ if (acpi_dev_resource_io(res, r))
+ pnp_add_resource(dev, r);
break;
case ACPI_RESOURCE_TYPE_DMA:
dma = &res->data.dma;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index d459cd17b477..be9eaee8f4ae 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -285,12 +285,17 @@ extern int pnpacpi_disabled;

#define PXM_INVAL (-1)

+struct resource_win {
+ struct resource res;
+ resource_size_t offset;
+};
+
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 *res);
+ struct resource_win *win);
bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
- struct resource *res);
+ struct resource_win *win);
unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
struct resource *res);
--
1.7.10.4