Merge bk://linux-dj.bkbits.net/cpufreq

into home.osdl.org:/home/torvalds/v2.5/linux

CREDITS

@@ -1522,17 +1522,12 @@ S: USA
 
 N: Dave Jones
 E: davej@codemonkey.org.uk
-E: davej@suse.de
 W: http://www.codemonkey.org.uk
 D: x86 errata/setup maintenance.
 D: AGPGART driver.
+D: CPUFREQ maintenance.
 D: Backport/Forwardport merge monkey.
 D: Various Janitor work.
-S: c/o SuSE Linux UK Ltd
-S: Appleton House
-S: 139 King Street
-S: Hammersmith
-S: W6 9JG
 S: United Kingdom
 
 N: Ani Joshi

Documentation/cpu-freq/core.txt

@@ -73,9 +73,9 @@ The phase is specified in the second argument to the notifier.
 The third argument, a void *pointer, points to a struct cpufreq_policy
 consisting of five values: cpu, min, max, policy and max_cpu_freq. min 
 and max are the lower and upper frequencies (in kHz) of the new
-policy, policy the new policy, cpu the number of the affected CPU or
-CPUFREQ_ALL_CPUS for all CPUs; and max_cpu_freq the maximum supported
-CPU frequency. This value is given for informational purposes only.
+policy, policy the new policy, cpu the number of the affected CPU; and 
+max_cpu_freq the maximum supported CPU frequency. This value is given 
+for informational purposes only.
 
 
 2.2 CPUFreq transition notifiers
@@ -89,6 +89,6 @@ CPUFREQ_POSTCHANGE.
 
 The third argument is a struct cpufreq_freqs with the following
 values:
-cpu	- number of the affected CPU or CPUFREQ_ALL_CPUS
+cpu	- number of the affected CPU
 old	- old frequency
 new	- new frequency

Documentation/cpu-freq/cpu-drivers.txt

@@ -41,16 +41,17 @@ on what is necessary:
 1.1 Initialization
 ------------------
 
-First of all, in an __initcall level 7 or later (preferrably
-module_init() so that your driver is modularized) function check
-whether this kernel runs on the right CPU and the right chipset. If
-so, register a struct cpufreq_driver with the CPUfreq core using
-cpufreq_register_driver()
+First of all, in an __initcall level 7 (module_init()) or later
+function check whether this kernel runs on the right CPU and the right
+chipset. If so, register a struct cpufreq_driver with the CPUfreq core
+using cpufreq_register_driver()
 
 What shall this struct cpufreq_driver contain? 
 
 cpufreq_driver.name -		The name of this driver.
 
+cpufreq_driver.owner -		THIS_MODULE;
+
 cpufreq_driver.init -		A pointer to the per-CPU initialization 
 				function.
 
@@ -76,8 +77,7 @@ cpufreq driver registers itself, the per-CPU initialization function
 cpufreq_driver.init is called. It takes a struct cpufreq_policy
 *policy as argument. What to do now?
 
-If necessary, activate the CPUfreq support on your CPU (unlock that
-register etc.).
+If necessary, activate the CPUfreq support on your CPU.
 
 Then, the driver must fill in the following values:
 

Documentation/cpu-freq/governors.txt

@@ -135,21 +135,21 @@ CPUfreq core to ensure proper locking.
 The CPUfreq governor may call the CPU processor driver using one of
 these two functions:
 
-inline int cpufreq_driver_target(struct cpufreq_policy *policy,
+int cpufreq_driver_target(struct cpufreq_policy *policy,
                                  unsigned int target_freq,
                                  unsigned int relation);
 
-inline int cpufreq_driver_target_l(struct cpufreq_policy *policy,
+int __cpufreq_driver_target(struct cpufreq_policy *policy,
                                    unsigned int target_freq,
                                    unsigned int relation);
 
 target_freq must be within policy->min and policy->max, of course.
 What's the difference between these two functions? When your governor
 still is in a direct code path of a call to governor->governor, the
-cpufreq_driver_sem lock is still held in the cpufreq core, and there's
+per-CPU cpufreq lock is still held in the cpufreq core, and there's
 no need to lock it again (in fact, this would cause a deadlock). So
-use cpufreq_driver_target only in these cases. In all other cases (for
-example, when there's a "daemonized" function that wakes up every
-second), use cpufreq_driver_target_l to lock the cpufreq_driver_sem
-before the command is passed to the cpufreq processor driver.
+use __cpufreq_driver_target only in these cases. In all other cases 
+(for example, when there's a "daemonized" function that wakes up 
+every second), use cpufreq_driver_target to lock the cpufreq per-CPU
+lock before the command is passed to the cpufreq processor driver.
 

Documentation/cpu-freq/user-guide.txt

@@ -132,7 +132,7 @@ the processor shall run at.
 The preferred interface is located in the sysfs filesystem. If you
 mounted it at /sys, the cpufreq interface is located in a subdirectory
 "cpufreq" within the cpu-device directory
-(e.g. /sys/class/cpu/cpu0/cpufreq/ for the first CPU).
+(e.g. /sys/devices/system/cpu/cpu0/cpufreq/ for the first CPU).
 
 cpuinfo_min_freq :		this file shows the minimum operating
 				frequency the processor can run at(in kHz) 

MAINTAINERS

@@ -431,8 +431,10 @@ W:	http://www.fi.muni.cz/~kas/cosa/
 S:	Maintained
 
 CPU FREQUENCY DRIVERS
+P:	Dave Jones
+M:	davej@codemonkey.org.uk
 L:	cpufreq@www.linux.org.uk
-W:      http://www.brodo.de/cpufreq/
+W:	http://www.codemonkey.org.uk/cpufreq/
 S:	Maintained
 
 CPUID/MSR DRIVER
@@ -840,7 +842,7 @@ S:	Maintained
 
 i386 SETUP CODE / CPU ERRATA WORKAROUNDS
 P:	Dave Jones
-M:	davej@suse.de
+M:	davej@codemonkey.org.uk
 P:	H. Peter Anvin
 M:	hpa@zytor.com
 S:	Maintained

arch/i386/kernel/cpu/common.c

@@ -288,11 +288,24 @@ void __init identify_cpu(struct cpuinfo_x86 *c)
 			c->x86 = 3;
 	}
 
-	if (this_cpu->c_identify)
-		this_cpu->c_identify(c);
-	else
 	generic_identify(c);
 
+	printk(KERN_DEBUG "CPU:     After generic identify, caps: %08lx %08lx %08lx %08lx\n",
+		c->x86_capability[0],
+		c->x86_capability[1],
+		c->x86_capability[2],
+		c->x86_capability[3]);
+
+	if (this_cpu->c_identify) {
+		this_cpu->c_identify(c);
+
+	printk(KERN_DEBUG "CPU:     After vendor identify, caps: %08lx %08lx %08lx %08lx\n",
+		c->x86_capability[0],
+		c->x86_capability[1],
+		c->x86_capability[2],
+		c->x86_capability[3]);
+}
+
 	/*
 	 * Vendor-specific initialization.  In this section we
 	 * canonicalize the feature flags, meaning if there are
@@ -341,7 +354,7 @@ void __init identify_cpu(struct cpuinfo_x86 *c)
 
 	/* Now the feature flags better reflect actual CPU features! */
 
-	printk(KERN_DEBUG "CPU:     After generic, caps: %08lx %08lx %08lx %08lx\n",
+	printk(KERN_DEBUG "CPU:     After all inits, caps: %08lx %08lx %08lx %08lx\n",
 	       c->x86_capability[0],
 	       c->x86_capability[1],
 	       c->x86_capability[2],

arch/i386/kernel/cpu/cpufreq/acpi.c

@@ -380,7 +380,7 @@ static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file)
 static int
 acpi_processor_write_performance (
         struct file		*file,
-        const char		*buffer,
+        const char		__user *buffer,
         size_t			count,
         loff_t			*data)
 {

arch/i386/kernel/cpu/cpufreq/longhaul.h

+/*
+ *  longhaul.h
+ *  (C) 2003 Dave Jones.
+ *
+ *  Licensed under the terms of the GNU GPL License version 2.
+ *
+ *  VIA-specific information
+ */
+
+union msr_bcr2 {
+	struct {
+		unsigned Reseved:19,	// 18:0
+		ESOFTBF:1,		// 19
+		Reserved2:3,		// 22:20
+		CLOCKMUL:4,		// 26:23
+		Reserved3:5;		// 31:27
+	} bits;
+	unsigned long val;
+};
+
+union msr_longhaul {
+	struct {
+		unsigned RevisionID:4,	// 3:0
+		RevisionKey:4,		// 7:4
+		EnableSoftBusRatio:1,	// 8
+		EnableSoftVID:1,	// 9
+		EnableSoftBSEL:1,	// 10
+		Reserved:3,		// 11:13
+		SoftBusRatio4:1,	// 14
+		VRMRev:1,		// 15
+		SoftBusRatio:4,		// 19:16
+		SoftVID:5,		// 24:20
+		Reserved2:3,		// 27:25
+		SoftBSEL:2,		// 29:28
+		Reserved3:2,		// 31:30
+		MaxMHzBR:4,		// 35:32
+		MaximumVID:5,		// 40:36
+		MaxMHzFSB:2,		// 42:41
+		MaxMHzBR4:1,		// 43
+		Reserved4:4,		// 47:44
+		MinMHzBR:4,		// 51:48
+		MinimumVID:5,		// 56:52
+		MinMHzFSB:2,		// 58:57
+		MinMHzBR4:1,		// 59
+		Reserved5:4;		// 63:60
+	} bits;
+	unsigned long long val;
+};
+

arch/i386/kernel/cpu/cpufreq/longrun.c

 /*
- *  $Id: longrun.c,v 1.25 2003/02/28 16:03:50 db Exp $
- *
  * (C) 2002 - 2003  Dominik Brodowski <linux@brodo.de>
  *
  *  Licensed under the terms of the GNU GPL License version 2.
@@ -123,7 +121,7 @@ static int longrun_verify_policy(struct cpufreq_policy *policy)
 		policy->cpuinfo.max_freq);
 
 	if (policy->policy == CPUFREQ_POLICY_GOVERNOR)
-		policy->policy = longrun_driver.policy[0].policy;
+		return -EINVAL;
 
 	return 0;
 }

arch/i386/kernel/cpu/cpufreq/powernow-k6.c

 /*
- *  $Id: powernow-k6.c,v 1.48 2003/02/22 10:23:46 db Exp $
- *  This file was part of Powertweak Linux (http://powertweak.sf.net)
- *  and is shared with the Linux Kernel module.
- *
+ *  This file was based upon code in Powertweak Linux (http://powertweak.sf.net)
  *  (C) 2000-2003  Dave Jones, Arjan van de Ven, Janne Pnkl, Dominik Brodowski.
  *
  *  Licensed under the terms of the GNU GPL License version 2.
@@ -230,7 +227,7 @@ static void __exit powernow_k6_exit(void)
 }
 
 
-MODULE_AUTHOR ("Arjan van de Ven <arjanv@redhat.com>, Dave Jones <davej@suse.de>, Dominik Brodowski <linux@brodo.de>");
+MODULE_AUTHOR ("Arjan van de Ven <arjanv@redhat.com>, Dave Jones <davej@codemonkey.org.uk>, Dominik Brodowski <linux@brodo.de>");
 MODULE_DESCRIPTION ("PowerNow! driver for AMD K6-2+ / K6-3+ processors.");
 MODULE_LICENSE ("GPL");
 

arch/i386/kernel/cpu/cpufreq/powernow-k7.c

 /*
- *  $Id: powernow-k7.c,v 1.34 2003/02/22 10:23:46 db Exp $
- *
- *  (C) 2003 Dave Jones <davej@suse.de>
+ *  AMD K7 Powernow driver.
+ *  (C) 2003 Dave Jones <davej@codemonkey.org.uk> on behalf of SuSE Labs.
  *
  *  Licensed under the terms of the GNU GPL License version 2.
  *  Based upon datasheets & sample CPUs kindly provided by AMD.
@@ -85,27 +84,6 @@ static unsigned int latency;
 static char have_a0;
 
 
-#ifndef rdmsrl
-#define rdmsrl(msr,val) do {unsigned long l__,h__; \
-	rdmsr (msr, l__, h__);	\
-	val = l__;	\
-	val |= ((u64)h__<<32);	\
-} while(0)
-#endif
-
-#ifndef wrmsrl
-static void wrmsrl (u32 msr, u64 val)
-{
-	u32 lo, hi;
-
-	lo = (u32) val;
-	hi = val >> 32;
-	wrmsr (msr, lo, hi);
-}
-#endif
-
-
-
 static int check_powernow(void)
 {
 	struct cpuinfo_x86 *c = cpu_data;
@@ -240,6 +218,7 @@ static void change_speed (unsigned int index)
 	u8 fid, vid;
 	struct cpufreq_freqs freqs;
 	union msr_fidvidstatus fidvidstatus;
+	int cfid;
 
 	/* fid are the lower 8 bits of the index we stored into
 	 * the cpufreq frequency table in powernow_decode_bios,
@@ -251,8 +230,9 @@ static void change_speed (unsigned int index)
 
 	freqs.cpu = 0;
 
+	cfid = fidvidstatus.bits.CFID;
 	rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
-	freqs.old = fsb * fid_codes[fidvidstatus.bits.CFID] * 100;
+	freqs.old = fsb * fid_codes[cfid] * 100;
 	freqs.new = powernow_table[index].frequency;
 
 	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
@@ -426,7 +406,7 @@ static void __exit powernow_exit (void)
 		kfree(powernow_table);
 }
 
-MODULE_AUTHOR ("Dave Jones <davej@suse.de>");
+MODULE_AUTHOR ("Dave Jones <davej@codemonkey.org.uk>");
 MODULE_DESCRIPTION ("Powernow driver for AMD K7 processors.");
 MODULE_LICENSE ("GPL");
 

arch/i386/kernel/cpu/cpufreq/powernow-k7.h

@@ -8,14 +8,6 @@
  *
  */
 
-#ifndef MSR_K7_FID_VID_CTL
-#define MSR_K7_FID_VID_CTL		0xc0010041
-#endif
-#ifndef MSR_K7_FID_VID_STATUS
-#define MSR_K7_FID_VID_STATUS	0xc0010042
-#endif
-
-
 union msr_fidvidctl {
 	struct {
 		unsigned FID:5,			// 4:0

arch/i386/kernel/cpu/cpufreq/speedstep-ich.c

@@ -82,7 +82,7 @@ static void speedstep_set_state (unsigned int state, unsigned int notify)
 		return;
 
 	freqs.old = speedstep_get_processor_frequency(speedstep_processor);
-	freqs.new = speedstep_freqs[SPEEDSTEP_LOW].frequency;
+	freqs.new = speedstep_freqs[state].frequency;
 	freqs.cpu = 0; /* speedstep.c is UP only driver */
 	
 	if (notify)
@@ -137,7 +137,7 @@ static void speedstep_set_state (unsigned int state, unsigned int notify)
 	dprintk(KERN_DEBUG "cpufreq: read at pmbase 0x%x + 0x50 returned 0x%x\n", pmbase, value);
 
 	if (state == (value & 0x1)) {
-		dprintk (KERN_INFO "cpufreq: change to %u MHz succeeded\n", (freqs.new / 1000));
+		dprintk (KERN_INFO "cpufreq: change to %u MHz succeeded\n", (speedstep_get_processor_frequency(speedstep_processor) / 1000));
 	} else {
 		printk (KERN_ERR "cpufreq: change failed - I/O error\n");
 	}
@@ -295,7 +295,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
 		return -EIO;
 
 	dprintk(KERN_INFO "cpufreq: currently at %s speed setting - %i MHz\n", 
-		(speed == speedstep_low_freq) ? "low" : "high",
+		(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
 		(speed / 1000));
 
 	/* cpuinfo and default policy values */
@@ -356,7 +356,7 @@ static void __exit speedstep_exit(void)
 }
 
 
-MODULE_AUTHOR ("Dave Jones <davej@suse.de>, Dominik Brodowski <linux@brodo.de>");
+MODULE_AUTHOR ("Dave Jones <davej@codemonkey.org.uk>, Dominik Brodowski <linux@brodo.de>");
 MODULE_DESCRIPTION ("Speedstep driver for Intel mobile processors on chipsets with ICH-M southbridges.");
 MODULE_LICENSE ("GPL");
 

drivers/cpufreq/userspace.c

@@ -158,7 +158,7 @@ EXPORT_SYMBOL(cpufreq_get);
 /*********************** cpufreq_sysctl interface ********************/
 static int
 cpufreq_procctl(ctl_table *ctl, int write, struct file *filp,
-		void *buffer, size_t *lenp)
+		void __user *buffer, size_t *lenp)
 {
 	char buf[16], *p;
 	int cpu = (int) ctl->extra1;
@@ -195,9 +195,9 @@ cpufreq_procctl(ctl_table *ctl, int write, struct file *filp,
 }
 
 static int
-cpufreq_sysctl(ctl_table *table, int *name, int nlen,
-	       void *oldval, size_t *oldlenp,
-	       void *newval, size_t newlen, void **context)
+cpufreq_sysctl(ctl_table *table, int __user *name, int nlen,
+	       void __user *oldval, size_t __user *oldlenp,
+	       void __user *newval, size_t newlen, void **context)
 {
 	int cpu = (int) table->extra1;
 
@@ -524,10 +524,10 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
 		cpu_min_freq[cpu] = policy->min;
 		cpu_max_freq[cpu] = policy->max;
 		if (policy->max < cpu_cur_freq[cpu])
-			cpufreq_driver_target(&current_policy[cpu], policy->max, 
+			__cpufreq_driver_target(&current_policy[cpu], policy->max, 
 			      CPUFREQ_RELATION_H);
 		else if (policy->min > cpu_cur_freq[cpu])
-			cpufreq_driver_target(&current_policy[cpu], policy->min, 
+			__cpufreq_driver_target(&current_policy[cpu], policy->min, 
 			      CPUFREQ_RELATION_L);
 		memcpy (&current_policy[cpu], policy, sizeof(struct cpufreq_policy));
 		up(&userspace_sem);

include/asm-i386/msr.h

@@ -17,6 +17,21 @@
 			  : /* no outputs */ \
 			  : "c" (msr), "a" (val1), "d" (val2))
 
+#define rdmsrl(msr,val) do { \
+	unsigned long l__,h__; \
+	rdmsr (msr, l__, h__);  \
+	val = l__;  \
+	val |= ((u64)h__<<32);  \
+} while(0)
+
+static inline void wrmsrl (unsigned long msr, unsigned long long val)
+{
+	unsigned long lo, hi;
+	lo = (unsigned long) val;
+	hi = val >> 32;
+	wrmsr (msr, lo, hi);
+}
+
 #define rdtsc(low,high) \
      __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
 
@@ -200,7 +215,7 @@
 #define MSR_K7_HWCR			0xC0010015
 #define MSR_K7_CLK_CTL			0xC001001b
 #define MSR_K7_FID_VID_CTL		0xC0010041
-#define MSR_K7_VID_STATUS		0xC0010042
+#define MSR_K7_FID_VID_STATUS		0xC0010042
 
 /* Centaur-Hauls/IDT defined MSRs. */
 #define MSR_IDT_FCR1			0x107

include/linux/cpufreq.h

@@ -137,10 +137,14 @@ struct cpufreq_governor {
 
 /* pass a target to the cpufreq driver 
  */
-inline int cpufreq_driver_target(struct cpufreq_policy *policy,
+extern int cpufreq_driver_target(struct cpufreq_policy *policy,
+				 unsigned int target_freq,
+				 unsigned int relation);
+extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
 				   unsigned int target_freq,
 				   unsigned int relation);
 
+
 /* pass an event to the cpufreq governor */
 int cpufreq_governor(unsigned int cpu, unsigned int event);
 
@@ -160,8 +164,6 @@ struct cpufreq_driver {
 	struct module           *owner;
 	char			name[CPUFREQ_NAME_LEN];
 
-	struct cpufreq_policy	*policy;
-
 	/* needed by all drivers */
 	int	(*init)		(struct cpufreq_policy *policy);
 	int	(*verify)	(struct cpufreq_policy *policy);