On Wednesday, November 07, 2012 03:05:48 PM Mika Westerberg wrote:
> On Wed, Nov 07, 2012 at 12:14:31PM +0100, Rafael J. Wysocki wrote:
> > > So is the idea now that the ACPI core parses the resources and passes them
> > > forward via struct acpi_device? I'm just wondering how to proceed with
> > > these I2C and SPI enumeration patches.
> >
> > Well, we definitely don't want to duplicate what
> > drivers/pnp/pnpacpi/rsparser.c
> > does, so the idea is to move the code from there to the core in such a way
> > that
> > both the SPI/I2C patches and the PNP layer can use it.
>
> Ok.
>
> > I'll have some prototype code ready shortly, hopefully, and I'll post it
> > in that form for comments (and so that you know what to expect).
>
> Sounds good. Thanks!
There you go.
I haven't even try to compile it, so most likely it breaks things left, right
and in between, but I hope it shows the idea.
It does a couple of things at the same time, so it should be split into a few
simpler patches. First, it moves some code from drivers/pnp/pnpacpi/rsparser.c
to a new file drivers/acpi/resource.c and makes pnpacpi use functions from
there. Second, it changes acpi_platform.c to use those functions too.
Finally, it adds a list of ACPI resources to struct acpi_device and
makes acpi_platform.c use that list intead of evaluating _CRS and parsing its
output with acpi_walk_resources().
While changing acpi_platform.c I noticed that we had a bug in there, because
GSIs were registered for the struct acpi_device object, although they should be
registered for the struct platform_device one created by that code. I didn't
try to fix that in the patch below, but it generally needs fixing.
Thanks,
Rafael
Prototype, no sign-off.
---
drivers/acpi/Makefile | 1
drivers/acpi/acpi_platform.c | 122 +++++-------------
drivers/acpi/resource.c | 269 +++++++++++++++++++++++++++++++++++++++++
drivers/acpi/scan.c | 48 +++++++
drivers/pnp/base.h | 2
drivers/pnp/pnpacpi/rsparser.c | 150 +---------------------
drivers/pnp/resource.c | 16 ++
include/acpi/acpi_bus.h | 6
8 files changed, 386 insertions(+), 228 deletions(-)
Index: linux-pm/include/acpi/acpi_bus.h
===================================================================
--- linux-pm.orig/include/acpi/acpi_bus.h
+++ linux-pm/include/acpi/acpi_bus.h
@@ -259,6 +259,11 @@ struct acpi_device_physical_node {
struct device *dev;
};
+struct acpi_resource_list_entry {
+ struct list_head node;
+ struct acpi_resource resource;
+};
+
/* set maximum of physical nodes to 32 for expansibility */
#define ACPI_MAX_PHYSICAL_NODE 32
@@ -269,6 +274,7 @@ struct acpi_device {
struct acpi_device *parent;
struct list_head children;
struct list_head node;
+ struct list_head resources; /* Device resources. */
struct list_head wakeup_list;
struct acpi_device_status status;
struct acpi_device_flags flags;
Index: linux-pm/drivers/acpi/scan.c
===================================================================
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -670,6 +670,8 @@ end:
static void acpi_device_unregister(struct acpi_device *device, int type)
{
+ struct acpi_resource_list_entry *entry, *s;
+
mutex_lock(&acpi_device_lock);
if (device->parent)
list_del(&device->node);
@@ -681,6 +683,9 @@ static void acpi_device_unregister(struc
acpi_device_remove_files(device);
device_unregister(&device->dev);
+
+ list_for_each_entry_safe(entry, s, &device->resources, node)
+ kfree(entry);
}
/* --------------------------------------------------------------------------
@@ -990,6 +995,40 @@ static void acpi_bus_get_wakeup_device_f
"error in _DSW or _PSW evaluation\n"));
}
+static acpi_status acpi_bus_add_resource(struct acpi_resource *res,
+ void *context)
+{
+ struct list_head *list = context;
+ struct acpi_resource_list_entry *entry;
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return AE_NO_MEMORY;
+
+ entry->resource = *res;
+ list_add_tail(&entry->node, list);
+ return AE_OK;
+}
+
+static int acpi_bus_get_resources(struct acpi_device *adev)
+{
+ acpi_status status;
+ int ret = 0;
+
+ status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
+ acpi_bus_add_resource, &adev->resources);
+ if (ACPI_FAILURE(status)) {
+ switch(status) {
+ case AE_NO_MEMORY:
+ ret = -ENOMEM;
+ break;
+ default:
+ ret = -EIO;
+ }
+ }
+ return ret;
+}
+
static void acpi_bus_add_power_resource(acpi_handle handle);
static int acpi_bus_get_power_flags(struct acpi_device *device)
@@ -1412,6 +1451,15 @@ static int acpi_add_single_object(struct
acpi_device_set_id(device);
/*
+ * Device Resources
+ * ----------------
+ */
+ INIT_LIST_HEAD(&device->resources);
+ result = acpi_bus_get_resources(device);
+ if (result)
+ goto end;
+
+ /*
* Power Management
* ----------------
*/
Index: linux-pm/drivers/acpi/resource.c
===================================================================
--- /dev/null
+++ linux-pm/drivers/acpi/resource.c
@@ -0,0 +1,269 @@
+/*
+ * drivers/acpi/resource.c - ACPI device resources management.
+ *
+ * Copyright (C) 2012, Intel Corp.
+ * Author: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/ioport.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+
+static unsigned long acpi_dev_memresource_flags(u64 len, u8 write_protect,
+ bool window)
+{
+ unsigned long flags = IORESOURCE_MEM;
+
+ if (len == 0)
+ flags |= IORESOURCE_DISABLED;
+
+ if (write_protect == ACPI_READ_WRITE_MEMORY)
+ flags |= IORESOURCE_MEM_WRITEABLE;
+
+ if (window)
+ flags |= IORESOURCE_WINDOW;
+
+ return flags;
+}
+
+static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
+ u8 write_protect)
+{
+ res->start = start;
+ res->end = start + len - 1;
+ res->flags = acpi_dev_memresource_flags(len, write_protect, false);
+}
+
+/**
+ * acpi_dev_resource_memory - Extract ACPI memory resource information.
+ * @ares: Input ACPI resource object.
+ * @res: Output generic resource object.
+ *
+ * Check if the given ACPI resource object represents a memory resource and
+ * if that's the case, use the information in it to populate the generic
+ * resource object pointed to by @res.
+ */
+bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
+{
+ struct acpi_resource_memory24 *memory24;
+ struct acpi_resource_memory32 *memory32;
+ struct acpi_resource_fixed_memory32 *fixed_memory32;
+
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ memory24 = &ares->data.memory24;
+ acpi_dev_get_memresource(res, memory24->minimum,
+ memory24->address_length,
+ memory24->write_protect);
+ break;
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ memory32 = &ares->data.memory32;
+ acpi_dev_get_memresource(res, memory32->minimum,
+ memory32->address_length,
+ memory32->write_protect);
+ break;
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ fixed_memory32 = &ares->data.fixed_memory32;
+ acpi_dev_get_memresource(res, fixed_memory32->address,
+ fixed_memory32->address_length,
+ fixed_memory32->write_protect);
+ break;
+ default:
+ return false;
+ }
+ return true;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
+
+static void acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode,
+ bool window)
+{
+ int flags = IORESOURCE_IO;
+
+ if (io_decode == ACPI_DECODE_16)
+ flags |= IORESOURCE_IO_16BIT_ADDR;
+
+ if (start > end || end >= 0x10003)
+ flags |= IORESOURCE_DISABLED;
+
+ if (window)
+ flags |= IORESOURCE_WINDOW;
+
+ return flags;
+}
+
+static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
+ u8 io_decode)
+{
+ u64 end = start + len - 1;
+
+ res->start = start;
+ res->end = end;
+ res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false);
+}
+
+/**
+ * acpi_dev_resource_io - Extract ACPI I/O resource information.
+ * @ares: Input ACPI resource object.
+ * @res: Output generic resource object.
+ *
+ * Check if the given ACPI resource object represents an I/O resource and
+ * if that's the case, use the information in it to populate the generic
+ * resource object pointed to by @res.
+ */
+bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
+{
+ struct acpi_resource_io *io;
+ struct acpi_resource_fixed_io *fixed_io;
+
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_IO:
+ io = &ares->data.io;
+ acpi_dev_get_ioresource(res, io->minimum,
+ io->address_length,
+ io->io_decode);
+ break;
+ case ACPI_RESOURCE_TYPE_FIXED_IO
+ fixed_io = &res->data.fixed_io;
+ acpi_dev_get_ioresource(res, fixed_io->address,
+ fixed_io->address_length,
+ ACPI_DECODE_10);
+ break;
+ default:
+ return false;
+ }
+ return true;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
+
+/**
+ * acpi_dev_resource_address_space - Extract ACPI address space information.
+ * @ares: Input ACPI resource object.
+ * @res: 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.
+ */
+bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+ struct resource *res)
+{
+ acpi_status status;
+ struct acpi_resource_address64 addr;
+ bool window;
+ u64 len;
+ u8 io_decode;
+
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ break;
+ default:
+ return false;
+ }
+
+ status = acpi_resource_to_address64(ares, &addr);
+ if (ACPI_FAILURE(status))
+ return true;
+
+ res->start = addr.minimum;
+ res->end = addr.maximum;
+ window = addr.producer_consumer == ACPI_PRODUCER;
+
+ switch(resource_type) {
+ case ACPI_MEMORY_RANGE:
+ len = addr.maximum - addr.minimum + 1;
+ res->flags = acpi_dev_memresource_flags(len,
+ addr.info.mem.write_protect,
+ window);
+ break;
+ case ACPI_IO_RANGE:
+ io_decode = addr.granularity == 0xfff ?
+ ACPI_DECODE_10 : ACPI_DECODE_16;
+ res->flags = acpi_dev_ioresource_flags(addr.minimum,
+ addr.maximum,
+ io_decode, window);
+ break;
+ case ACPI_BUS_NUMBER_RANGE:
+ res->flags = IORESOURCE_BUS;
+ break;
+ default:
+ res->flags = 0;
+ }
+
+ return true;
+}
+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.
+ *
+ * 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.
+ */
+bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
+ struct resource *res)
+{
+ acpi_status status;
+ struct acpi_resource_extended_address64 *ext_addr;
+ bool window;
+ u64 len;
+ u8 io_decode;
+
+ if (res->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
+ return false;
+
+ ext_addr = &res->data.ext_address64;
+
+ res->start = ext_addr->minimum;
+ res->end = ext_addr->maximum;
+ window = ext_addr->producer_consumer == ACPI_PRODUCER;
+
+ switch(resource_type) {
+ case ACPI_MEMORY_RANGE:
+ len = ext_addr->maximum - ext_addr->minimum + 1;
+ res->flags = acpi_dev_memresource_flags(len,
+ ext_addr->info.mem.write_protect,
+ window);
+ break;
+ case ACPI_IO_RANGE:
+ io_decode = ext_addr->granularity == 0xfff ?
+ ACPI_DECODE_10 : ACPI_DECODE_16;
+ res->flags = acpi_dev_ioresource_flags(ext_addr->minimum,
+ ext_addr->maximum,
+ io_decode, window);
+ break;
+ case ACPI_BUS_NUMBER_RANGE:
+ res->flags = IORESOURCE_BUS;
+ break;
+ default:
+ res->flags = 0;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
Index: linux-pm/drivers/acpi/Makefile
===================================================================
--- linux-pm.orig/drivers/acpi/Makefile
+++ linux-pm/drivers/acpi/Makefile
@@ -33,6 +33,7 @@ acpi-$(CONFIG_ACPI_SLEEP) += proc.o
#
acpi-y += bus.o glue.o
acpi-y += scan.o
+acpi-y += resource.o
acpi-y += processor_core.o
acpi-y += ec.o
acpi-$(CONFIG_ACPI_DOCK) += dock.o
Index: linux-pm/drivers/pnp/pnpacpi/rsparser.c
===================================================================
--- linux-pm.orig/drivers/pnp/pnpacpi/rsparser.c
+++ linux-pm/drivers/pnp/pnpacpi/rsparser.c
@@ -177,23 +177,6 @@ static int dma_flags(struct pnp_dev *dev
return flags;
}
-static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
- u64 len, int io_decode,
- int window)
-{
- int flags = 0;
- u64 end = start + len - 1;
-
- if (io_decode == ACPI_DECODE_16)
- flags |= IORESOURCE_IO_16BIT_ADDR;
- if (len == 0 || end >= 0x10003)
- flags |= IORESOURCE_DISABLED;
- if (window)
- flags |= IORESOURCE_WINDOW;
-
- pnp_add_io_resource(dev, start, end, flags);
-}
-
/*
* Device CSRs that do not appear in PCI config space should be described
* via ACPI. This would normally be done with Address Space Descriptors
@@ -249,83 +232,6 @@ static void pnpacpi_parse_allocated_vend
}
}
-static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
- u64 start, u64 len,
- int write_protect, int window)
-{
- int flags = 0;
- u64 end = start + len - 1;
-
- if (len == 0)
- flags |= IORESOURCE_DISABLED;
- if (write_protect == ACPI_READ_WRITE_MEMORY)
- flags |= IORESOURCE_MEM_WRITEABLE;
- if (window)
- flags |= IORESOURCE_WINDOW;
-
- pnp_add_mem_resource(dev, start, end, flags);
-}
-
-static void pnpacpi_parse_allocated_busresource(struct pnp_dev *dev,
- u64 start, u64 len)
-{
- u64 end = start + len - 1;
-
- pnp_add_bus_resource(dev, start, end);
-}
-
-static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
- struct acpi_resource *res)
-{
- struct acpi_resource_address64 addr, *p = &addr;
- acpi_status status;
- int window;
- u64 len;
-
- status = acpi_resource_to_address64(res, p);
- if (!ACPI_SUCCESS(status)) {
- dev_warn(&dev->dev, "failed to convert resource type %d\n",
- res->type);
- return;
- }
-
- /* Windows apparently computes length rather than using _LEN */
- len = p->maximum - p->minimum + 1;
- window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
-
- if (p->resource_type == ACPI_MEMORY_RANGE)
- pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
- p->info.mem.write_protect, window);
- else if (p->resource_type == ACPI_IO_RANGE)
- pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
- p->granularity == 0xfff ? ACPI_DECODE_10 :
- ACPI_DECODE_16, window);
- else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
- pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
-}
-
-static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
- struct acpi_resource *res)
-{
- struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
- int window;
- u64 len;
-
- /* Windows apparently computes length rather than using _LEN */
- len = p->maximum - p->minimum + 1;
- window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
-
- if (p->resource_type == ACPI_MEMORY_RANGE)
- pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
- p->info.mem.write_protect, window);
- else if (p->resource_type == ACPI_IO_RANGE)
- pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
- p->granularity == 0xfff ? ACPI_DECODE_10 :
- ACPI_DECODE_16, window);
- else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
- pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
-}
-
static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
void *data)
{
@@ -339,8 +245,17 @@ static acpi_status pnpacpi_allocated_res
struct acpi_resource_memory32 *memory32;
struct acpi_resource_fixed_memory32 *fixed_memory32;
struct acpi_resource_extended_irq *extended_irq;
+ struct resource r;
int i, flags;
+ if (acpi_dev_resource_memory(res, &r)
+ || acpi_dev_resource_io(res, &r)
+ || acpi_dev_resource_address_space(res, &r)
+ || acpi_dev_resource_ext_address_space(res, &r))
+ pnp_add_resource(dev, &r);
+ return AE_OK;
+ }
+
switch (res->type) {
case ACPI_RESOURCE_TYPE_IRQ:
/*
@@ -383,26 +298,10 @@ static acpi_status pnpacpi_allocated_res
pnp_add_dma_resource(dev, dma->channels[0], flags);
break;
- case ACPI_RESOURCE_TYPE_IO:
- io = &res->data.io;
- pnpacpi_parse_allocated_ioresource(dev,
- io->minimum,
- io->address_length,
- io->io_decode, 0);
- break;
-
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
case ACPI_RESOURCE_TYPE_END_DEPENDENT:
break;
- case ACPI_RESOURCE_TYPE_FIXED_IO:
- fixed_io = &res->data.fixed_io;
- pnpacpi_parse_allocated_ioresource(dev,
- fixed_io->address,
- fixed_io->address_length,
- ACPI_DECODE_10, 0);
- break;
-
case ACPI_RESOURCE_TYPE_VENDOR:
vendor_typed = &res->data.vendor_typed;
pnpacpi_parse_allocated_vendor(dev, vendor_typed);
@@ -411,37 +310,6 @@ static acpi_status pnpacpi_allocated_res
case ACPI_RESOURCE_TYPE_END_TAG:
break;
- case ACPI_RESOURCE_TYPE_MEMORY24:
- memory24 = &res->data.memory24;
- pnpacpi_parse_allocated_memresource(dev,
- memory24->minimum,
- memory24->address_length,
- memory24->write_protect, 0);
- break;
- case ACPI_RESOURCE_TYPE_MEMORY32:
- memory32 = &res->data.memory32;
- pnpacpi_parse_allocated_memresource(dev,
- memory32->minimum,
- memory32->address_length,
- memory32->write_protect, 0);
- break;
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- fixed_memory32 = &res->data.fixed_memory32;
- pnpacpi_parse_allocated_memresource(dev,
- fixed_memory32->address,
- fixed_memory32->address_length,
- fixed_memory32->write_protect, 0);
- break;
- case ACPI_RESOURCE_TYPE_ADDRESS16:
- case ACPI_RESOURCE_TYPE_ADDRESS32:
- case ACPI_RESOURCE_TYPE_ADDRESS64:
- pnpacpi_parse_allocated_address_space(dev, res);
- break;
-
- case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
- pnpacpi_parse_allocated_ext_address_space(dev, res);
- break;
-
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
extended_irq = &res->data.extended_irq;
Index: linux-pm/drivers/pnp/base.h
===================================================================
--- linux-pm.orig/drivers/pnp/base.h
+++ linux-pm/drivers/pnp/base.h
@@ -159,6 +159,8 @@ struct pnp_resource {
void pnp_free_resource(struct pnp_resource *pnp_res);
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+ struct resource *res);
struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
int flags);
struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
Index: linux-pm/drivers/pnp/resource.c
===================================================================
--- linux-pm.orig/drivers/pnp/resource.c
+++ linux-pm/drivers/pnp/resource.c
@@ -503,6 +503,22 @@ static struct pnp_resource *pnp_new_reso
return pnp_res;
}
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+ struct resource *res)
+{
+ struct pnp_resource *pnp_res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource %pR\n", res);
+ return NULL;
+ }
+
+ pnp_res->res = *res;
+ dev_dbg(&dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
int flags)
{
Index: linux-pm/drivers/acpi/acpi_platform.c
===================================================================
--- linux-pm.orig/drivers/acpi/acpi_platform.c
+++ linux-pm/drivers/acpi/acpi_platform.c
@@ -19,76 +19,30 @@
ACPI_MODULE_NAME("platform");
-struct resource_info {
- struct device *dev;
- struct resource *res;
- size_t n, cur;
-};
-
-static acpi_status acpi_platform_count_resources(struct acpi_resource *res,
- void *data)
+static acpi_status acpi_platform_resource_size(struct acpi_resource *res)
{
- struct acpi_resource_extended_irq *acpi_xirq;
- struct resource_info *ri = data;
-
- switch (res->type) {
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- case ACPI_RESOURCE_TYPE_IRQ:
- ri->n++;
- break;
- case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
- acpi_xirq = &res->data.extended_irq;
- ri->n += acpi_xirq->interrupt_count;
- break;
- case ACPI_RESOURCE_TYPE_ADDRESS32:
- if (res->data.address32.resource_type == ACPI_IO_RANGE)
- ri->n++;
- break;
- }
-
- return AE_OK;
+ return res->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ ?
+ res->data.extended_irq.interrupt_count : 1;
}
-static acpi_status acpi_platform_add_resources(struct acpi_resource *res,
- void *data)
+static acpi_status acpi_platform_add_resource(struct device *dev,
+ struct acpi_resource *res,
+ struct resource *resources,
+ unsigned int count)
{
- struct acpi_resource_fixed_memory32 *acpi_mem;
- struct acpi_resource_address32 *acpi_add32;
struct acpi_resource_extended_irq *acpi_xirq;
struct acpi_resource_irq *acpi_irq;
- struct resource_info *ri = data;
- struct resource *r;
+ struct resource *r = resources + count;
int irq, i;
- switch (res->type) {
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- acpi_mem = &res->data.fixed_memory32;
- r = &ri->res[ri->cur++];
-
- r->start = acpi_mem->address;
- r->end = r->start + acpi_mem->address_length - 1;
- r->flags = IORESOURCE_MEM;
-
- dev_dbg(ri->dev, "Memory32Fixed %pR\n", r);
- break;
-
- case ACPI_RESOURCE_TYPE_ADDRESS32:
- acpi_add32 = &res->data.address32;
-
- if (acpi_add32->resource_type == ACPI_IO_RANGE) {
- r = &ri->res[ri->cur++];
- r->start = acpi_add32->minimum;
- r->end = r->start + acpi_add32->address_length - 1;
- r->flags = IORESOURCE_IO;
- dev_dbg(ri->dev, "Address32 %pR\n", r);
- }
- break;
+ if (acpi_dev_resource_memory(res, &r)
+ || acpi_dev_resource_address_space(res, &r))
+ return 1;
+ switch (res->type) {
case ACPI_RESOURCE_TYPE_IRQ:
acpi_irq = &res->data.irq;
- r = &ri->res[ri->cur++];
-
- irq = acpi_register_gsi(ri->dev,
+ irq = acpi_register_gsi(dev,
acpi_irq->interrupts[0],
acpi_irq->triggering,
acpi_irq->polarity);
@@ -96,15 +50,13 @@ static acpi_status acpi_platform_add_res
r->start = r->end = irq;
r->flags = IORESOURCE_IRQ;
- dev_dbg(ri->dev, "IRQ %pR\n", r);
- break;
+ dev_dbg(dev, "Interrupt %pR\n", r);
+ return 1;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
acpi_xirq = &res->data.extended_irq;
-
- for (i = 0; i < acpi_xirq->interrupt_count; i++, ri->cur++) {
- r = &ri->res[ri->cur];
- irq = acpi_register_gsi(ri->dev,
+ for (i = 0; i < acpi_xirq->interrupt_count; i++, r++) {
+ irq = acpi_register_gsi(dev,
acpi_xirq->interrupts[i],
acpi_xirq->triggering,
acpi_xirq->polarity);
@@ -112,12 +64,12 @@ static acpi_status acpi_platform_add_res
r->start = r->end = irq;
r->flags = IORESOURCE_IRQ;
- dev_dbg(ri->dev, "Interrupt %pR\n", r);
+ dev_dbg(dev, "Interrupt %pR\n", r);
}
- break;
+ return i;
}
- return AE_OK;
+ return 0;
}
static acpi_status acpi_platform_get_device_uid(struct acpi_device *adev,
@@ -154,7 +106,9 @@ struct platform_device *acpi_create_plat
struct platform_device *pdev = NULL;
struct acpi_device *acpi_parent;
struct device *parent = NULL;
- struct resource_info ri;
+ struct acpi_resource_list_entry *entry;
+ struct resource *resources;
+ unsigned int count = 0;
acpi_status status;
int devid;
@@ -170,29 +124,22 @@ struct platform_device *acpi_create_plat
memset(&ri, 0, sizeof(ri));
/* First, count the resources. */
- status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
- acpi_platform_count_resources, &ri);
- if (ACPI_FAILURE(status) || !ri.n)
- return NULL;
+ list_for_each_entry(entry, &adev->resources, node)
+ count += acpi_platform_resource_size(&entry->resource);
/* Next, allocate memory for all the resources and populate it. */
- ri.dev = &adev->dev;
- ri.res = kzalloc(ri.n * sizeof(struct resource), GFP_KERNEL);
- if (!ri.res) {
+ resources = kalloc(count * sizeof(struct resource), GFP_KERNEL);
+ if (!resources) {
dev_err(&adev->dev,
"failed to allocate memory for resources\n");
return NULL;
}
- status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
- acpi_platform_add_resources, &ri);
- if (ACPI_FAILURE(status)) {
- dev_err(&adev->dev, "failed to walk resources\n");
- goto out;
- }
-
- if (WARN_ON(ri.n != ri.cur))
- goto out;
+ count = 0;
+ list_for_each_entry(entry, &adev->resources, node)
+ count += acpi_platform_add_resource(&adev->dev,
+ &entry->resource,
+ resources, count);
/*
* If the ACPI node has a parent and that parent has a physical device
@@ -215,7 +162,8 @@ struct platform_device *acpi_create_plat
mutex_unlock(&acpi_parent->physical_node_lock);
}
pdev = platform_device_register_resndata(parent, acpi_device_hid(adev),
- devid, ri.res, ri.n, NULL, 0);
+ devid, resources, count,
+ NULL, 0);
if (IS_ERR(pdev)) {
dev_err(&adev->dev, "platform device creation failed: %ld\n",
PTR_ERR(pdev));
@@ -226,7 +174,7 @@ struct platform_device *acpi_create_plat
}
out:
- kfree(ri.res);
+ kfree(resources);
return pdev;
}
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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