if (!addr || !length)
return;
- acpi_reserve_region(addr, length, gas->space_id, 0, desc);
+ /* Resources are never freed */
+ if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
+ request_region(addr, length, desc);
+ else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ request_mem_region(addr, length, desc);
}
-static void __init acpi_reserve_resources(void)
+static int __init acpi_reserve_resources(void)
{
acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
"ACPI PM1a_EVT_BLK");
if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
+
+ return 0;
}
+fs_initcall_sync(acpi_reserve_resources);
void acpi_os_printf(const char *fmt, ...)
{
acpi_status __init acpi_os_initialize1(void)
{
- acpi_reserve_resources();
kacpid_wq = alloc_workqueue("kacpid", 0, 1);
kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1);
#include <linux/device.h>
#include <linux/export.h>
#include <linux/ioport.h>
-#include <linux/list.h>
#include <linux/slab.h>
#ifdef CONFIG_X86
return c.count;
}
EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
-
-struct reserved_region {
- struct list_head node;
- u64 start;
- u64 end;
-};
-
-static LIST_HEAD(reserved_io_regions);
-static LIST_HEAD(reserved_mem_regions);
-
-static int request_range(u64 start, u64 end, u8 space_id, unsigned long flags,
- char *desc)
-{
- unsigned int length = end - start + 1;
- struct resource *res;
-
- res = space_id == ACPI_ADR_SPACE_SYSTEM_IO ?
- request_region(start, length, desc) :
- request_mem_region(start, length, desc);
- if (!res)
- return -EIO;
-
- res->flags &= ~flags;
- return 0;
-}
-
-static int add_region_before(u64 start, u64 end, u8 space_id,
- unsigned long flags, char *desc,
- struct list_head *head)
-{
- struct reserved_region *reg;
- int error;
-
- reg = kmalloc(sizeof(*reg), GFP_KERNEL);
- if (!reg)
- return -ENOMEM;
-
- error = request_range(start, end, space_id, flags, desc);
- if (error) {
- kfree(reg);
- return error;
- }
-
- reg->start = start;
- reg->end = end;
- list_add_tail(®->node, head);
- return 0;
-}
-
-/**
- * acpi_reserve_region - Reserve an I/O or memory region as a system resource.
- * @start: Starting address of the region.
- * @length: Length of the region.
- * @space_id: Identifier of address space to reserve the region from.
- * @flags: Resource flags to clear for the region after requesting it.
- * @desc: Region description (for messages).
- *
- * Reserve an I/O or memory region as a system resource to prevent others from
- * using it. If the new region overlaps with one of the regions (in the given
- * address space) already reserved by this routine, only the non-overlapping
- * parts of it will be reserved.
- *
- * Returned is either 0 (success) or a negative error code indicating a resource
- * reservation problem. It is the code of the first encountered error, but the
- * routine doesn't abort until it has attempted to request all of the parts of
- * the new region that don't overlap with other regions reserved previously.
- *
- * The resources requested by this routine are never released.
- */
-int acpi_reserve_region(u64 start, unsigned int length, u8 space_id,
- unsigned long flags, char *desc)
-{
- struct list_head *regions;
- struct reserved_region *reg;
- u64 end = start + length - 1;
- int ret = 0, error = 0;
-
- if (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
- regions = &reserved_io_regions;
- else if (space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
- regions = &reserved_mem_regions;
- else
- return -EINVAL;
-
- if (list_empty(regions))
- return add_region_before(start, end, space_id, flags, desc, regions);
-
- list_for_each_entry(reg, regions, node)
- if (reg->start == end + 1) {
- /* The new region can be prepended to this one. */
- ret = request_range(start, end, space_id, flags, desc);
- if (!ret)
- reg->start = start;
-
- return ret;
- } else if (reg->start > end) {
- /* No overlap. Add the new region here and get out. */
- return add_region_before(start, end, space_id, flags,
- desc, ®->node);
- } else if (reg->end == start - 1) {
- goto combine;
- } else if (reg->end >= start) {
- goto overlap;
- }
-
- /* The new region goes after the last existing one. */
- return add_region_before(start, end, space_id, flags, desc, regions);
-
- overlap:
- /*
- * The new region overlaps an existing one.
- *
- * The head part of the new region immediately preceding the existing
- * overlapping one can be combined with it right away.
- */
- if (reg->start > start) {
- error = request_range(start, reg->start - 1, space_id, flags, desc);
- if (error)
- ret = error;
- else
- reg->start = start;
- }
-
- combine:
- /*
- * The new region is adjacent to an existing one. If it extends beyond
- * that region all the way to the next one, it is possible to combine
- * all three of them.
- */
- while (reg->end < end) {
- struct reserved_region *next = NULL;
- u64 a = reg->end + 1, b = end;
-
- if (!list_is_last(®->node, regions)) {
- next = list_next_entry(reg, node);
- if (next->start <= end)
- b = next->start - 1;
- }
- error = request_range(a, b, space_id, flags, desc);
- if (!error) {
- if (next && next->start == b + 1) {
- reg->end = next->end;
- list_del(&next->node);
- kfree(next);
- } else {
- reg->end = end;
- break;
- }
- } else if (next) {
- if (!ret)
- ret = error;
-
- reg = next;
- } else {
- break;
- }
- }
-
- return ret ? ret : error;
-}
-EXPORT_SYMBOL_GPL(acpi_reserve_region);
* Bjorn Helgaas <bjorn.helgaas@hp.com>
*/
-#include <linux/acpi.h>
#include <linux/pnp.h>
#include <linux/device.h>
#include <linux/init.h>
{"", 0}
};
-#ifdef CONFIG_ACPI
-static bool __reserve_range(u64 start, unsigned int length, bool io, char *desc)
-{
- u8 space_id = io ? ACPI_ADR_SPACE_SYSTEM_IO : ACPI_ADR_SPACE_SYSTEM_MEMORY;
- return !acpi_reserve_region(start, length, space_id, IORESOURCE_BUSY, desc);
-}
-#else
-static bool __reserve_range(u64 start, unsigned int length, bool io, char *desc)
-{
- struct resource *res;
-
- res = io ? request_region(start, length, desc) :
- request_mem_region(start, length, desc);
- if (res) {
- res->flags &= ~IORESOURCE_BUSY;
- return true;
- }
- return false;
-}
-#endif
-
static void reserve_range(struct pnp_dev *dev, struct resource *r, int port)
{
char *regionid;
const char *pnpid = dev_name(&dev->dev);
resource_size_t start = r->start, end = r->end;
- bool reserved;
+ struct resource *res;
regionid = kmalloc(16, GFP_KERNEL);
if (!regionid)
return;
snprintf(regionid, 16, "pnp %s", pnpid);
- reserved = __reserve_range(start, end - start + 1, !!port, regionid);
- if (!reserved)
+ if (port)
+ res = request_region(start, end - start + 1, regionid);
+ else
+ res = request_mem_region(start, end - start + 1, regionid);
+ if (res)
+ res->flags &= ~IORESOURCE_BUSY;
+ else
kfree(regionid);
/*
* have double reservations.
*/
dev_info(&dev->dev, "%pR %s reserved\n", r,
- reserved ? "has been" : "could not be");
+ res ? "has been" : "could not be");
}
static void reserve_resources_of_dev(struct pnp_dev *dev)
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff