pr_osl.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:8k
- /******************************************************************************
- *
- * Module Name: pr_osl.c
- * $Revision: 21 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 Andrew Grover
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/types.h>
- #include <linux/proc_fs.h>
- #include <linux/pci.h>
- #include <acpi.h>
- #include <bm.h>
- #include "pr.h"
- MODULE_AUTHOR("Andrew Grover");
- MODULE_DESCRIPTION("ACPI Component Architecture (CA) - IA32 Processor Driver");
- MODULE_LICENSE("GPL");
- #define PR_PROC_ROOT "processor"
- #define PR_PROC_STATUS "status"
- #define PR_PROC_INFO "info"
- extern struct proc_dir_entry *bm_proc_root;
- static struct proc_dir_entry *pr_proc_root = NULL;
- extern unsigned short acpi_piix4_bmisx;
- /****************************************************************************
- *
- * FUNCTION: pr_osl_proc_read_status
- *
- ****************************************************************************/
- static int
- pr_osl_proc_read_status (
- char *page,
- char **start,
- off_t off,
- int count,
- int *eof,
- void *context)
- {
- PR_CONTEXT *processor = NULL;
- char *p = page;
- int len = 0;
- if (!context || (off != 0)) {
- goto end;
- }
- processor = (PR_CONTEXT*)context;
- p += sprintf(p, "Bus Mastering Activity: %08xn",
- processor->power.bm_activity);
- p += sprintf(p, "C-State Utilization: C1[%d] C2[%d] C3[%d]n",
- processor->power.state[PR_C1].utilization,
- processor->power.state[PR_C2].utilization,
- processor->power.state[PR_C3].utilization);
- end:
- len = (p - page);
- if (len <= off+count) *eof = 1;
- *start = page + off;
- len -= off;
- if (len>count) len = count;
- if (len<0) len = 0;
- return(len);
- }
- /****************************************************************************
- *
- * FUNCTION: pr_osl_proc_read_info
- *
- ****************************************************************************/
- static int
- pr_osl_proc_read_info (
- char *page,
- char **start,
- off_t off,
- int count,
- int *eof,
- void *context)
- {
- PR_CONTEXT *processor = NULL;
- char *p = page;
- int len = 0;
- if (!context || (off != 0)) {
- goto end;
- }
- processor = (PR_CONTEXT*)context;
- p += sprintf(p, "<TBD>n");
- end:
- len = (p - page);
- if (len <= off+count) *eof = 1;
- *start = page + off;
- len -= off;
- if (len>count) len = count;
- if (len<0) len = 0;
- return(len);
- }
- /****************************************************************************
- *
- * FUNCTION: pr_osl_add_device
- *
- ****************************************************************************/
- acpi_status
- pr_osl_add_device(
- PR_CONTEXT *processor)
- {
- u32 i = 0;
- struct proc_dir_entry *proc_entry = NULL, *proc;
- char processor_uid[16];
- if (!processor) {
- return(AE_BAD_PARAMETER);
- }
- printk("Processor[%x]:", processor->uid);
- for (i=0; i<processor->power.state_count; i++) {
- if (processor->power.state[i].is_valid) {
- printk(" C%d", i);
- }
- }
- if (processor->performance.state_count > 1)
- printk(", %d throttling states", processor->performance.state_count);
- if (acpi_piix4_bmisx && processor->power.state[3].is_valid)
- printk(" (PIIX errata enabled)");
- printk("n");
- sprintf(processor_uid, "%d", processor->uid);
- proc_entry = proc_mkdir(processor_uid, pr_proc_root);
- if (!proc_entry)
- return(AE_ERROR);
- proc = create_proc_read_entry(PR_PROC_STATUS, S_IFREG | S_IRUGO,
- proc_entry, pr_osl_proc_read_status, (void*)processor);
- if (!proc_entry)
- return(AE_ERROR);
- proc = create_proc_read_entry(PR_PROC_INFO, S_IFREG | S_IRUGO,
- proc_entry, pr_osl_proc_read_info, (void*)processor);
- if (!proc_entry)
- return(AE_ERROR);
- return(AE_OK);
- }
- /****************************************************************************
- *
- * FUNCTION: pr_osl_remove_device
- *
- ****************************************************************************/
- acpi_status
- pr_osl_remove_device (
- PR_CONTEXT *processor)
- {
- char proc_entry[64];
- if (!processor) {
- return(AE_BAD_PARAMETER);
- }
- sprintf(proc_entry, "%d/%s", processor->uid, PR_PROC_INFO);
- remove_proc_entry(proc_entry, pr_proc_root);
- sprintf(proc_entry, "%d/%s", processor->uid, PR_PROC_STATUS);
- remove_proc_entry(proc_entry, pr_proc_root);
- sprintf(proc_entry, "%d", processor->uid);
- remove_proc_entry(proc_entry, pr_proc_root);
- return(AE_OK);
- }
- /****************************************************************************
- *
- * FUNCTION: pr_osl_generate_event
- *
- ****************************************************************************/
- acpi_status
- pr_osl_generate_event (
- u32 event,
- PR_CONTEXT *processor)
- {
- acpi_status status = AE_OK;
- char processor_uid[16];
- if (!processor) {
- return(AE_BAD_PARAMETER);
- }
- switch (event) {
- case PR_NOTIFY_PERF_STATES:
- case PR_NOTIFY_POWER_STATES:
- sprintf(processor_uid, "%d", processor->uid);
- status = bm_osl_generate_event(processor->device_handle,
- PR_PROC_ROOT, processor_uid, event, 0);
- break;
- default:
- return(AE_BAD_PARAMETER);
- break;
- }
- return(status);
- }
- /****************************************************************************
- * Errata Handling
- ****************************************************************************/
- void acpi_pr_errata (void)
- {
- struct pci_dev *dev = NULL;
- while ((dev = pci_find_subsys(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
- PCI_ANY_ID, PCI_ANY_ID, dev))) {
- switch (dev->device) {
- case PCI_DEVICE_ID_INTEL_82801BA_8: /* PIIX4U4 */
- case PCI_DEVICE_ID_INTEL_82801BA_9: /* PIIX4U3 */
- case PCI_DEVICE_ID_INTEL_82451NX: /* PIIX4NX */
- case PCI_DEVICE_ID_INTEL_82372FB_1: /* PIIX4U2 */
- case PCI_DEVICE_ID_INTEL_82801AA_1: /* PIIX4U */
- case PCI_DEVICE_ID_INTEL_82443MX_1: /* PIIX4E2 */
- case PCI_DEVICE_ID_INTEL_82801AB_1: /* PIIX4E */
- case PCI_DEVICE_ID_INTEL_82371AB: /* PIIX4 */
- acpi_piix4_bmisx = pci_resource_start(dev, 4);
- return;
- }
- }
- return;
- }
- /****************************************************************************
- *
- * FUNCTION: pr_osl_init
- *
- * PARAMETERS: <none>
- *
- * RETURN: 0: Success
- *
- * DESCRIPTION: Module initialization.
- *
- ****************************************************************************/
- static int __init
- pr_osl_init (void)
- {
- acpi_status status = AE_OK;
- /* abort if no busmgr */
- if (!bm_proc_root)
- return -ENODEV;
- acpi_pr_errata();
- pr_proc_root = proc_mkdir(PR_PROC_ROOT, bm_proc_root);
- if (!pr_proc_root) {
- status = AE_ERROR;
- }
- else {
- status = pr_initialize();
- if (ACPI_FAILURE(status)) {
- remove_proc_entry(PR_PROC_ROOT, bm_proc_root);
- }
- }
- return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
- }
- /****************************************************************************
- *
- * FUNCTION: pr_osl_cleanup
- *
- * PARAMETERS: <none>
- *
- * RETURN: <none>
- *
- * DESCRIPTION: Module cleanup.
- *
- ****************************************************************************/
- static void __exit
- pr_osl_cleanup (void)
- {
- pr_terminate();
- if (pr_proc_root) {
- remove_proc_entry(PR_PROC_ROOT, bm_proc_root);
- }
- return;
- }
- module_init(pr_osl_init);
- module_exit(pr_osl_cleanup);