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@@ -1,612 +0,0 @@
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-/*
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- * (C) Copyright 2008 Intel Corporation
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- * Authors:
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- * Andy Henroid <andrew.d.henroid@intel.com>
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- * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
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- */
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-
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-/*
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- * Save DIMM power on Intel 7300-based platforms when all CPUs/cores
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- * are idle, using the DIMM thermal throttling capability.
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- *
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- * This driver depends on the Intel integrated DMA controller (I/O AT).
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- * If the driver for I/O AT (drivers/dma/ioatdma*) is also enabled,
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- * this driver should work cooperatively.
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- */
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-
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-/* #define DEBUG */
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-
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-#include <linux/module.h>
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-#include <linux/pci.h>
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-#include <linux/gfp.h>
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-#include <linux/sched.h>
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-#include <linux/notifier.h>
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-#include <linux/cpumask.h>
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-#include <linux/ktime.h>
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-#include <linux/delay.h>
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-#include <linux/debugfs.h>
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-#include <linux/stop_machine.h>
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-#include <linux/i7300_idle.h>
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-
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-#include <asm/idle.h>
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-
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-#include "../dma/ioat/hw.h"
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-#include "../dma/ioat/registers.h"
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-
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-#define I7300_IDLE_DRIVER_VERSION "1.55"
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-#define I7300_PRINT "i7300_idle:"
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-
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-#define MAX_STOP_RETRIES 10
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-
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-static int debug;
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-module_param_named(debug, debug, uint, 0644);
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-MODULE_PARM_DESC(debug, "Enable debug printks in this driver");
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-
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-static int forceload;
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-module_param_named(forceload, forceload, uint, 0644);
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-MODULE_PARM_DESC(debug, "Enable driver testing on unvalidated i5000");
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-
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-#define dprintk(fmt, arg...) \
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- do { if (debug) printk(KERN_INFO I7300_PRINT fmt, ##arg); } while (0)
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-
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-/*
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- * Value to set THRTLOW to when initiating throttling
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- * 0 = No throttling
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- * 1 = Throttle when > 4 activations per eval window (Maximum throttling)
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- * 2 = Throttle when > 8 activations
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- * 168 = Throttle when > 672 activations (Minimum throttling)
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- */
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-#define MAX_THROTTLE_LOW_LIMIT 168
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-static uint throttle_low_limit = 1;
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-module_param_named(throttle_low_limit, throttle_low_limit, uint, 0644);
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-MODULE_PARM_DESC(throttle_low_limit,
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- "Value for THRTLOWLM activation field "
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- "(0 = disable throttle, 1 = Max throttle, 168 = Min throttle)");
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-
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-/*
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- * simple invocation and duration statistics
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- */
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-static unsigned long total_starts;
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-static unsigned long total_us;
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-
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-#ifdef DEBUG
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-static unsigned long past_skip;
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-#endif
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-
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-static struct pci_dev *fbd_dev;
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-
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-static raw_spinlock_t i7300_idle_lock;
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-static int i7300_idle_active;
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-
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-static u8 i7300_idle_thrtctl_saved;
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-static u8 i7300_idle_thrtlow_saved;
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-static u32 i7300_idle_mc_saved;
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-
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-static cpumask_var_t idle_cpumask;
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-static ktime_t start_ktime;
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-static unsigned long avg_idle_us;
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-
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-static struct dentry *debugfs_dir;
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-
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-/* Begin: I/O AT Helper routines */
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-
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-#define IOAT_CHANBASE(ioat_ctl, chan) (ioat_ctl + 0x80 + 0x80 * chan)
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-/* Snoop control (disable snoops when coherency is not important) */
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-#define IOAT_DESC_SADDR_SNP_CTL (1UL << 1)
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-#define IOAT_DESC_DADDR_SNP_CTL (1UL << 2)
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-
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-static struct pci_dev *ioat_dev;
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-static struct ioat_dma_descriptor *ioat_desc; /* I/O AT desc & data (1 page) */
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-static unsigned long ioat_desc_phys;
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-static u8 *ioat_iomap; /* I/O AT memory-mapped control regs (aka CB_BAR) */
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-static u8 *ioat_chanbase;
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-
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-/* Start I/O AT memory copy */
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-static int i7300_idle_ioat_start(void)
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-{
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- u32 err;
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- /* Clear error (due to circular descriptor pointer) */
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- err = readl(ioat_chanbase + IOAT_CHANERR_OFFSET);
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- if (err)
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- writel(err, ioat_chanbase + IOAT_CHANERR_OFFSET);
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-
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- writeb(IOAT_CHANCMD_START, ioat_chanbase + IOAT1_CHANCMD_OFFSET);
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- return 0;
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-}
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-
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-/* Stop I/O AT memory copy */
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-static void i7300_idle_ioat_stop(void)
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-{
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- int i;
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- u64 sts;
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-
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- for (i = 0; i < MAX_STOP_RETRIES; i++) {
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- writeb(IOAT_CHANCMD_RESET,
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- ioat_chanbase + IOAT1_CHANCMD_OFFSET);
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-
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- udelay(10);
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-
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- sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
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- IOAT_CHANSTS_STATUS;
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-
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- if (sts != IOAT_CHANSTS_ACTIVE)
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- break;
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-
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- }
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-
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- if (i == MAX_STOP_RETRIES) {
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- dprintk("failed to stop I/O AT after %d retries\n",
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- MAX_STOP_RETRIES);
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- }
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-}
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-
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-/* Test I/O AT by copying 1024 byte from 2k to 1k */
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-static int __init i7300_idle_ioat_selftest(u8 *ctl,
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- struct ioat_dma_descriptor *desc, unsigned long desc_phys)
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-{
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- u64 chan_sts;
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-
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- memset(desc, 0, 2048);
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- memset((u8 *) desc + 2048, 0xab, 1024);
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-
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- desc[0].size = 1024;
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- desc[0].ctl = 0;
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- desc[0].src_addr = desc_phys + 2048;
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- desc[0].dst_addr = desc_phys + 1024;
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- desc[0].next = 0;
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-
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- writeb(IOAT_CHANCMD_RESET, ioat_chanbase + IOAT1_CHANCMD_OFFSET);
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- writeb(IOAT_CHANCMD_START, ioat_chanbase + IOAT1_CHANCMD_OFFSET);
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-
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- udelay(1000);
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-
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- chan_sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
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- IOAT_CHANSTS_STATUS;
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-
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- if (chan_sts != IOAT_CHANSTS_DONE) {
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- /* Not complete, reset the channel */
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- writeb(IOAT_CHANCMD_RESET,
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- ioat_chanbase + IOAT1_CHANCMD_OFFSET);
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- return -1;
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- }
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-
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- if (*(u32 *) ((u8 *) desc + 3068) != 0xabababab ||
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- *(u32 *) ((u8 *) desc + 2044) != 0xabababab) {
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- dprintk("Data values src 0x%x, dest 0x%x, memset 0x%x\n",
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- *(u32 *) ((u8 *) desc + 2048),
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- *(u32 *) ((u8 *) desc + 1024),
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- *(u32 *) ((u8 *) desc + 3072));
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- return -1;
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- }
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- return 0;
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-}
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-
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-static struct device dummy_dma_dev = {
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- .init_name = "fallback device",
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- .coherent_dma_mask = DMA_BIT_MASK(64),
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- .dma_mask = &dummy_dma_dev.coherent_dma_mask,
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-};
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-
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-/* Setup and initialize I/O AT */
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-/* This driver needs I/O AT as the throttling takes effect only when there is
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- * some memory activity. We use I/O AT to set up a dummy copy, while all CPUs
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- * go idle and memory is throttled.
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- */
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-static int __init i7300_idle_ioat_init(void)
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-{
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- u8 ver, chan_count, ioat_chan;
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- u16 chan_ctl;
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-
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- ioat_iomap = (u8 *) ioremap_nocache(pci_resource_start(ioat_dev, 0),
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- pci_resource_len(ioat_dev, 0));
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-
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- if (!ioat_iomap) {
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- printk(KERN_ERR I7300_PRINT "failed to map I/O AT registers\n");
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- goto err_ret;
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- }
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-
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- ver = readb(ioat_iomap + IOAT_VER_OFFSET);
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- if (ver != IOAT_VER_1_2) {
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- printk(KERN_ERR I7300_PRINT "unknown I/O AT version (%u.%u)\n",
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- ver >> 4, ver & 0xf);
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- goto err_unmap;
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- }
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-
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- chan_count = readb(ioat_iomap + IOAT_CHANCNT_OFFSET);
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- if (!chan_count) {
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- printk(KERN_ERR I7300_PRINT "unexpected # of I/O AT channels "
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- "(%u)\n",
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- chan_count);
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- goto err_unmap;
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- }
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-
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- ioat_chan = chan_count - 1;
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- ioat_chanbase = IOAT_CHANBASE(ioat_iomap, ioat_chan);
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-
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- chan_ctl = readw(ioat_chanbase + IOAT_CHANCTRL_OFFSET);
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- if (chan_ctl & IOAT_CHANCTRL_CHANNEL_IN_USE) {
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- printk(KERN_ERR I7300_PRINT "channel %d in use\n", ioat_chan);
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- goto err_unmap;
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- }
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-
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- writew(IOAT_CHANCTRL_CHANNEL_IN_USE,
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- ioat_chanbase + IOAT_CHANCTRL_OFFSET);
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-
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- ioat_desc = (struct ioat_dma_descriptor *)dma_alloc_coherent(
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- &dummy_dma_dev, 4096,
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- (dma_addr_t *)&ioat_desc_phys, GFP_KERNEL);
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- if (!ioat_desc) {
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- printk(KERN_ERR I7300_PRINT "failed to allocate I/O AT desc\n");
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- goto err_mark_unused;
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- }
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-
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- writel(ioat_desc_phys & 0xffffffffUL,
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- ioat_chanbase + IOAT1_CHAINADDR_OFFSET_LOW);
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- writel(ioat_desc_phys >> 32,
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- ioat_chanbase + IOAT1_CHAINADDR_OFFSET_HIGH);
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-
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- if (i7300_idle_ioat_selftest(ioat_iomap, ioat_desc, ioat_desc_phys)) {
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- printk(KERN_ERR I7300_PRINT "I/O AT self-test failed\n");
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- goto err_free;
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- }
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-
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- /* Setup circular I/O AT descriptor chain */
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- ioat_desc[0].ctl = IOAT_DESC_SADDR_SNP_CTL | IOAT_DESC_DADDR_SNP_CTL;
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- ioat_desc[0].src_addr = ioat_desc_phys + 2048;
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- ioat_desc[0].dst_addr = ioat_desc_phys + 3072;
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- ioat_desc[0].size = 128;
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- ioat_desc[0].next = ioat_desc_phys + sizeof(struct ioat_dma_descriptor);
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-
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- ioat_desc[1].ctl = ioat_desc[0].ctl;
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- ioat_desc[1].src_addr = ioat_desc[0].src_addr;
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- ioat_desc[1].dst_addr = ioat_desc[0].dst_addr;
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- ioat_desc[1].size = ioat_desc[0].size;
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- ioat_desc[1].next = ioat_desc_phys;
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-
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- return 0;
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-
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-err_free:
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- dma_free_coherent(&dummy_dma_dev, 4096, (void *)ioat_desc, 0);
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-err_mark_unused:
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- writew(0, ioat_chanbase + IOAT_CHANCTRL_OFFSET);
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-err_unmap:
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- iounmap(ioat_iomap);
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-err_ret:
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- return -ENODEV;
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-}
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-
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-/* Cleanup I/O AT */
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-static void __exit i7300_idle_ioat_exit(void)
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-{
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- int i;
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- u64 chan_sts;
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-
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- i7300_idle_ioat_stop();
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-
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- /* Wait for a while for the channel to halt before releasing */
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- for (i = 0; i < MAX_STOP_RETRIES; i++) {
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- writeb(IOAT_CHANCMD_RESET,
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- ioat_chanbase + IOAT1_CHANCMD_OFFSET);
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-
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- chan_sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
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- IOAT_CHANSTS_STATUS;
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-
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- if (chan_sts != IOAT_CHANSTS_ACTIVE) {
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- writew(0, ioat_chanbase + IOAT_CHANCTRL_OFFSET);
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- break;
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- }
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- udelay(1000);
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- }
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-
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- chan_sts = readq(ioat_chanbase + IOAT1_CHANSTS_OFFSET) &
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- IOAT_CHANSTS_STATUS;
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-
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- /*
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- * We tried to reset multiple times. If IO A/T channel is still active
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- * flag an error and return without cleanup. Memory leak is better
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- * than random corruption in that extreme error situation.
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- */
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- if (chan_sts == IOAT_CHANSTS_ACTIVE) {
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- printk(KERN_ERR I7300_PRINT "Unable to stop IO A/T channels."
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- " Not freeing resources\n");
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- return;
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- }
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-
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- dma_free_coherent(&dummy_dma_dev, 4096, (void *)ioat_desc, 0);
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- iounmap(ioat_iomap);
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-}
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-
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-/* End: I/O AT Helper routines */
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-
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-#define DIMM_THRTLOW 0x64
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-#define DIMM_THRTCTL 0x67
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-#define DIMM_THRTCTL_THRMHUNT (1UL << 0)
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-#define DIMM_MC 0x40
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-#define DIMM_GTW_MODE (1UL << 17)
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-#define DIMM_GBLACT 0x60
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-
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-/*
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- * Keep track of an exponential-decaying average of recent idle durations.
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- * The latest duration gets DURATION_WEIGHT_PCT percentage weight
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- * in this average, with the old average getting the remaining weight.
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- *
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- * High weights emphasize recent history, low weights include long history.
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- */
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-#define DURATION_WEIGHT_PCT 55
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-
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-/*
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- * When the decaying average of recent durations or the predicted duration
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- * of the next timer interrupt is shorter than duration_threshold, the
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- * driver will decline to throttle.
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- */
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-#define DURATION_THRESHOLD_US 100
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-
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-
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-/* Store DIMM thermal throttle configuration */
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-static int i7300_idle_thrt_save(void)
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-{
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- u32 new_mc_val;
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- u8 gblactlm;
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-
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- pci_read_config_byte(fbd_dev, DIMM_THRTCTL, &i7300_idle_thrtctl_saved);
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- pci_read_config_byte(fbd_dev, DIMM_THRTLOW, &i7300_idle_thrtlow_saved);
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- pci_read_config_dword(fbd_dev, DIMM_MC, &i7300_idle_mc_saved);
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- /*
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- * Make sure we have Global Throttling Window Mode set to have a
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- * "short" window. This (mostly) works around an issue where
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- * throttling persists until the end of the global throttling window
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- * size. On the tested system, this was resulting in a maximum of
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- * 64 ms to exit throttling (average 32 ms). The actual numbers
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- * depends on system frequencies. Setting the short window reduces
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- * this by a factor of 4096.
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- *
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- * We will only do this only if the system is set for
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- * unlimited-activations while in open-loop throttling (i.e., when
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- * Global Activation Throttle Limit is zero).
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- */
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- pci_read_config_byte(fbd_dev, DIMM_GBLACT, &gblactlm);
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- dprintk("thrtctl_saved = 0x%02x, thrtlow_saved = 0x%02x\n",
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- i7300_idle_thrtctl_saved,
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- i7300_idle_thrtlow_saved);
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- dprintk("mc_saved = 0x%08x, gblactlm = 0x%02x\n",
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- i7300_idle_mc_saved,
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- gblactlm);
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- if (gblactlm == 0) {
|
|
|
- new_mc_val = i7300_idle_mc_saved | DIMM_GTW_MODE;
|
|
|
- pci_write_config_dword(fbd_dev, DIMM_MC, new_mc_val);
|
|
|
- return 0;
|
|
|
- } else {
|
|
|
- dprintk("could not set GTW_MODE = 1 (OLTT enabled)\n");
|
|
|
- return -ENODEV;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-/* Restore DIMM thermal throttle configuration */
|
|
|
-static void i7300_idle_thrt_restore(void)
|
|
|
-{
|
|
|
- pci_write_config_dword(fbd_dev, DIMM_MC, i7300_idle_mc_saved);
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTLOW, i7300_idle_thrtlow_saved);
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTCTL, i7300_idle_thrtctl_saved);
|
|
|
-}
|
|
|
-
|
|
|
-/* Enable DIMM thermal throttling */
|
|
|
-static void i7300_idle_start(void)
|
|
|
-{
|
|
|
- u8 new_ctl;
|
|
|
- u8 limit;
|
|
|
-
|
|
|
- new_ctl = i7300_idle_thrtctl_saved & ~DIMM_THRTCTL_THRMHUNT;
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
|
|
|
-
|
|
|
- limit = throttle_low_limit;
|
|
|
- if (unlikely(limit > MAX_THROTTLE_LOW_LIMIT))
|
|
|
- limit = MAX_THROTTLE_LOW_LIMIT;
|
|
|
-
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTLOW, limit);
|
|
|
-
|
|
|
- new_ctl = i7300_idle_thrtctl_saved | DIMM_THRTCTL_THRMHUNT;
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
|
|
|
-}
|
|
|
-
|
|
|
-/* Disable DIMM thermal throttling */
|
|
|
-static void i7300_idle_stop(void)
|
|
|
-{
|
|
|
- u8 new_ctl;
|
|
|
- u8 got_ctl;
|
|
|
-
|
|
|
- new_ctl = i7300_idle_thrtctl_saved & ~DIMM_THRTCTL_THRMHUNT;
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTCTL, new_ctl);
|
|
|
-
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTLOW, i7300_idle_thrtlow_saved);
|
|
|
- pci_write_config_byte(fbd_dev, DIMM_THRTCTL, i7300_idle_thrtctl_saved);
|
|
|
- pci_read_config_byte(fbd_dev, DIMM_THRTCTL, &got_ctl);
|
|
|
- WARN_ON_ONCE(got_ctl != i7300_idle_thrtctl_saved);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
- * i7300_avg_duration_check()
|
|
|
- * return 0 if the decaying average of recent idle durations is
|
|
|
- * more than DURATION_THRESHOLD_US
|
|
|
- */
|
|
|
-static int i7300_avg_duration_check(void)
|
|
|
-{
|
|
|
- if (avg_idle_us >= DURATION_THRESHOLD_US)
|
|
|
- return 0;
|
|
|
-
|
|
|
-#ifdef DEBUG
|
|
|
- past_skip++;
|
|
|
-#endif
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-/* Idle notifier to look at idle CPUs */
|
|
|
-static int i7300_idle_notifier(struct notifier_block *nb, unsigned long val,
|
|
|
- void *data)
|
|
|
-{
|
|
|
- unsigned long flags;
|
|
|
- ktime_t now_ktime;
|
|
|
- static ktime_t idle_begin_time;
|
|
|
- static int time_init = 1;
|
|
|
-
|
|
|
- if (!throttle_low_limit)
|
|
|
- return 0;
|
|
|
-
|
|
|
- if (unlikely(time_init)) {
|
|
|
- time_init = 0;
|
|
|
- idle_begin_time = ktime_get();
|
|
|
- }
|
|
|
-
|
|
|
- raw_spin_lock_irqsave(&i7300_idle_lock, flags);
|
|
|
- if (val == IDLE_START) {
|
|
|
-
|
|
|
- cpumask_set_cpu(smp_processor_id(), idle_cpumask);
|
|
|
-
|
|
|
- if (cpumask_weight(idle_cpumask) != num_online_cpus())
|
|
|
- goto end;
|
|
|
-
|
|
|
- now_ktime = ktime_get();
|
|
|
- idle_begin_time = now_ktime;
|
|
|
-
|
|
|
- if (i7300_avg_duration_check())
|
|
|
- goto end;
|
|
|
-
|
|
|
- i7300_idle_active = 1;
|
|
|
- total_starts++;
|
|
|
- start_ktime = now_ktime;
|
|
|
-
|
|
|
- i7300_idle_start();
|
|
|
- i7300_idle_ioat_start();
|
|
|
-
|
|
|
- } else if (val == IDLE_END) {
|
|
|
- cpumask_clear_cpu(smp_processor_id(), idle_cpumask);
|
|
|
- if (cpumask_weight(idle_cpumask) == (num_online_cpus() - 1)) {
|
|
|
- /* First CPU coming out of idle */
|
|
|
- u64 idle_duration_us;
|
|
|
-
|
|
|
- now_ktime = ktime_get();
|
|
|
-
|
|
|
- idle_duration_us = ktime_to_us(ktime_sub
|
|
|
- (now_ktime, idle_begin_time));
|
|
|
-
|
|
|
- avg_idle_us =
|
|
|
- ((100 - DURATION_WEIGHT_PCT) * avg_idle_us +
|
|
|
- DURATION_WEIGHT_PCT * idle_duration_us) / 100;
|
|
|
-
|
|
|
- if (i7300_idle_active) {
|
|
|
- ktime_t idle_ktime;
|
|
|
-
|
|
|
- idle_ktime = ktime_sub(now_ktime, start_ktime);
|
|
|
- total_us += ktime_to_us(idle_ktime);
|
|
|
-
|
|
|
- i7300_idle_ioat_stop();
|
|
|
- i7300_idle_stop();
|
|
|
- i7300_idle_active = 0;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-end:
|
|
|
- raw_spin_unlock_irqrestore(&i7300_idle_lock, flags);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static struct notifier_block i7300_idle_nb = {
|
|
|
- .notifier_call = i7300_idle_notifier,
|
|
|
-};
|
|
|
-
|
|
|
-MODULE_DEVICE_TABLE(pci, pci_tbl);
|
|
|
-
|
|
|
-static ssize_t stats_read_ul(struct file *fp, char __user *ubuf, size_t count,
|
|
|
- loff_t *off)
|
|
|
-{
|
|
|
- unsigned long *p = fp->private_data;
|
|
|
- char buf[32];
|
|
|
- int len;
|
|
|
-
|
|
|
- len = snprintf(buf, 32, "%lu\n", *p);
|
|
|
- return simple_read_from_buffer(ubuf, count, off, buf, len);
|
|
|
-}
|
|
|
-
|
|
|
-static const struct file_operations idle_fops = {
|
|
|
- .open = simple_open,
|
|
|
- .read = stats_read_ul,
|
|
|
- .llseek = default_llseek,
|
|
|
-};
|
|
|
-
|
|
|
-struct debugfs_file_info {
|
|
|
- void *ptr;
|
|
|
- char name[32];
|
|
|
- struct dentry *file;
|
|
|
-} debugfs_file_list[] = {
|
|
|
- {&total_starts, "total_starts", NULL},
|
|
|
- {&total_us, "total_us", NULL},
|
|
|
-#ifdef DEBUG
|
|
|
- {&past_skip, "past_skip", NULL},
|
|
|
-#endif
|
|
|
- {NULL, "", NULL}
|
|
|
- };
|
|
|
-
|
|
|
-static int __init i7300_idle_init(void)
|
|
|
-{
|
|
|
- raw_spin_lock_init(&i7300_idle_lock);
|
|
|
- total_us = 0;
|
|
|
-
|
|
|
- if (i7300_idle_platform_probe(&fbd_dev, &ioat_dev, forceload))
|
|
|
- return -ENODEV;
|
|
|
-
|
|
|
- if (i7300_idle_thrt_save())
|
|
|
- return -ENODEV;
|
|
|
-
|
|
|
- if (i7300_idle_ioat_init())
|
|
|
- return -ENODEV;
|
|
|
-
|
|
|
- if (!zalloc_cpumask_var(&idle_cpumask, GFP_KERNEL))
|
|
|
- return -ENOMEM;
|
|
|
-
|
|
|
- debugfs_dir = debugfs_create_dir("i7300_idle", NULL);
|
|
|
- if (debugfs_dir) {
|
|
|
- int i = 0;
|
|
|
-
|
|
|
- while (debugfs_file_list[i].ptr != NULL) {
|
|
|
- debugfs_file_list[i].file = debugfs_create_file(
|
|
|
- debugfs_file_list[i].name,
|
|
|
- S_IRUSR,
|
|
|
- debugfs_dir,
|
|
|
- debugfs_file_list[i].ptr,
|
|
|
- &idle_fops);
|
|
|
- i++;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- idle_notifier_register(&i7300_idle_nb);
|
|
|
-
|
|
|
- printk(KERN_INFO "i7300_idle: loaded v%s\n", I7300_IDLE_DRIVER_VERSION);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void __exit i7300_idle_exit(void)
|
|
|
-{
|
|
|
- idle_notifier_unregister(&i7300_idle_nb);
|
|
|
- free_cpumask_var(idle_cpumask);
|
|
|
-
|
|
|
- if (debugfs_dir) {
|
|
|
- int i = 0;
|
|
|
-
|
|
|
- while (debugfs_file_list[i].file != NULL) {
|
|
|
- debugfs_remove(debugfs_file_list[i].file);
|
|
|
- i++;
|
|
|
- }
|
|
|
-
|
|
|
- debugfs_remove(debugfs_dir);
|
|
|
- }
|
|
|
- i7300_idle_thrt_restore();
|
|
|
- i7300_idle_ioat_exit();
|
|
|
-}
|
|
|
-
|
|
|
-module_init(i7300_idle_init);
|
|
|
-module_exit(i7300_idle_exit);
|
|
|
-
|
|
|
-MODULE_AUTHOR("Andy Henroid <andrew.d.henroid@intel.com>");
|
|
|
-MODULE_DESCRIPTION("Intel Chipset DIMM Idle Power Saving Driver v"
|
|
|
- I7300_IDLE_DRIVER_VERSION);
|
|
|
-MODULE_LICENSE("GPL");
|
Linus Torvalds