1 files changed, 337 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
new file mode 100644
index 00000000000..19a0e513ea4
--- /dev/null
+++ b/drivers/acpi/acpica/evgpeutil.c
@@ -0,0 +1,337 @@
+/******************************************************************************
+ *
+ * Module Name: evgpeutil - GPE utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2010, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evgpeutil")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_walk_gpe_list
+ *
+ * PARAMETERS:  gpe_walk_callback   - Routine called for each GPE block
+ *              Context             - Value passed to callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk the GPE lists.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
+{
+        struct acpi_gpe_block_info *gpe_block;
+        struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+        acpi_status status = AE_OK;
+        acpi_cpu_flags flags;
+
+        ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
+
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+        /* Walk the interrupt level descriptor list */
+
+        gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+        while (gpe_xrupt_info) {
+
+                /* Walk all Gpe Blocks attached to this interrupt level */
+
+                gpe_block = gpe_xrupt_info->gpe_block_list_head;
+                while (gpe_block) {
+
+                        /* One callback per GPE block */
+
+                        status =
+                            gpe_walk_callback(gpe_xrupt_info, gpe_block,
+                                              context);
+                        if (ACPI_FAILURE(status)) {
+                                if (status == AE_CTRL_END) {    /* Callback abort */
+                                        status = AE_OK;
+                                }
+                                goto unlock_and_exit;
+                        }
+
+                        gpe_block = gpe_block->next;
+                }
+
+                gpe_xrupt_info = gpe_xrupt_info->next;
+        }
+
+      unlock_and_exit:
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_valid_gpe_event
+ *
+ * PARAMETERS:  gpe_event_info              - Info for this GPE
+ *
+ * RETURN:      TRUE if the gpe_event is valid
+ *
+ * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
+ *              Should be called only when the GPE lists are semaphore locked
+ *              and not subject to change.
+ *
+ ******************************************************************************/
+
+u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
+{
+        struct acpi_gpe_xrupt_info *gpe_xrupt_block;
+        struct acpi_gpe_block_info *gpe_block;
+
+        ACPI_FUNCTION_ENTRY();
+
+        /* No need for spin lock since we are not changing any list elements */
+
+        /* Walk the GPE interrupt levels */
+
+        gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
+        while (gpe_xrupt_block) {
+                gpe_block = gpe_xrupt_block->gpe_block_list_head;
+
+                /* Walk the GPE blocks on this interrupt level */
+
+                while (gpe_block) {
+                        if ((&gpe_block->event_info[0] <= gpe_event_info) &&
+                            (&gpe_block->event_info[gpe_block->gpe_count] >
+                             gpe_event_info)) {
+                                return (TRUE);
+                        }
+
+                        gpe_block = gpe_block->next;
+                }
+
+                gpe_xrupt_block = gpe_xrupt_block->next;
+        }
+
+        return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_get_gpe_xrupt_block
+ *
+ * PARAMETERS:  interrupt_number     - Interrupt for a GPE block
+ *
+ * RETURN:      A GPE interrupt block
+ *
+ * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
+ *              block per unique interrupt level used for GPEs. Should be
+ *              called only when the GPE lists are semaphore locked and not
+ *              subject to change.
+ *
+ ******************************************************************************/
+
+struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
+{
+        struct acpi_gpe_xrupt_info *next_gpe_xrupt;
+        struct acpi_gpe_xrupt_info *gpe_xrupt;
+        acpi_status status;
+        acpi_cpu_flags flags;
+
+        ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
+
+        /* No need for lock since we are not changing any list elements here */
+
+        next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
+        while (next_gpe_xrupt) {
+                if (next_gpe_xrupt->interrupt_number == interrupt_number) {
+                        return_PTR(next_gpe_xrupt);
+                }
+
+                next_gpe_xrupt = next_gpe_xrupt->next;
+        }
+
+        /* Not found, must allocate a new xrupt descriptor */
+
+        gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
+        if (!gpe_xrupt) {
+                return_PTR(NULL);
+        }
+
+        gpe_xrupt->interrupt_number = interrupt_number;
+
+        /* Install new interrupt descriptor with spin lock */
+
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+        if (acpi_gbl_gpe_xrupt_list_head) {
+                next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
+                while (next_gpe_xrupt->next) {
+                        next_gpe_xrupt = next_gpe_xrupt->next;
+                }
+
+                next_gpe_xrupt->next = gpe_xrupt;
+                gpe_xrupt->previous = next_gpe_xrupt;
+        } else {
+                acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
+        }
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+        /* Install new interrupt handler if not SCI_INT */
+
+        if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
+                status = acpi_os_install_interrupt_handler(interrupt_number,
+                                                           acpi_ev_gpe_xrupt_handler,
+                                                           gpe_xrupt);
+                if (ACPI_FAILURE(status)) {
+                        ACPI_ERROR((AE_INFO,
+                                    "Could not install GPE interrupt handler at level 0x%X",
+                                    interrupt_number));
+                        return_PTR(NULL);
+                }
+        }
+
+        return_PTR(gpe_xrupt);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_delete_gpe_xrupt
+ *
+ * PARAMETERS:  gpe_xrupt       - A GPE interrupt info block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
+ *              interrupt handler if not the SCI interrupt.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
+{
+        acpi_status status;
+        acpi_cpu_flags flags;
+
+        ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
+
+        /* We never want to remove the SCI interrupt handler */
+
+        if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
+                gpe_xrupt->gpe_block_list_head = NULL;
+                return_ACPI_STATUS(AE_OK);
+        }
+
+        /* Disable this interrupt */
+
+        status =
+            acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
+                                             acpi_ev_gpe_xrupt_handler);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /* Unlink the interrupt block with lock */
+
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+        if (gpe_xrupt->previous) {
+                gpe_xrupt->previous->next = gpe_xrupt->next;
+        } else {
+                /* No previous, update list head */
+
+                acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
+        }
+
+        if (gpe_xrupt->next) {
+                gpe_xrupt->next->previous = gpe_xrupt->previous;
+        }
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+        /* Free the block */
+
+        ACPI_FREE(gpe_xrupt);
+        return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_delete_gpe_handlers
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
+ *              Used only prior to termination.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+                            struct acpi_gpe_block_info *gpe_block,
+                            void *context)
+{
+        struct acpi_gpe_event_info *gpe_event_info;
+        u32 i;
+        u32 j;
+
+        ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
+
+        /* Examine each GPE Register within the block */
+
+        for (i = 0; i < gpe_block->register_count; i++) {
+
+                /* Now look at the individual GPEs in this byte register */
+
+                for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
+                        gpe_event_info = &gpe_block->event_info[((acpi_size) i *
+                                                                 ACPI_GPE_REGISTER_WIDTH)
+                                                                + j];
+
+                        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+                            ACPI_GPE_DISPATCH_HANDLER) {
+                                ACPI_FREE(gpe_event_info->dispatch.handler);
+                                gpe_event_info->dispatch.handler = NULL;
+                                gpe_event_info->flags &=
+                                    ~ACPI_GPE_DISPATCH_MASK;
+                        }
+                }
+        }
+
+        return_ACPI_STATUS(AE_OK);
+}