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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ][2/2] preregister support for powernow-k8
  [CPUFREQ][1/2] whitespace fix for powernow-k8
  [CPUFREQ] Update MAINTAINERS to reflect new mailing list.
  [CPUFREQ] Fix warning in elanfreq
  [CPUFREQ] Fix -Wshadow warning in conservative governor.
  [CPUFREQ] Remove EXPERIMENTAL annotation from VIA C7 powersaver kconfig.
This commit is contained in:
Linus Torvalds 2008-08-08 16:19:49 -07:00
parent 56831a1a88 34ae7f35a2
commit 796aadeb1b
6 changed files with 89 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
MAINTAINERS
View File

@ -1249,7 +1249,7 @@ S: Maintained
CPU FREQUENCY DRIVERS
P: Dave Jones
M: davej@codemonkey.org.uk
L: cpufreq@lists.linux.org.uk
L: cpufreq@vger.kernel.org
W: http://www.codemonkey.org.uk/projects/cpufreq/
T: git kernel.org/pub/scm/linux/kernel/git/davej/cpufreq.git
S: Maintained

4
arch/x86/kernel/cpu/cpufreq/Kconfig
View File

@ -235,9 +235,9 @@ config X86_LONGHAUL
If in doubt, say N.
config X86_E_POWERSAVER
tristate "VIA C7 Enhanced PowerSaver (EXPERIMENTAL)"
tristate "VIA C7 Enhanced PowerSaver"
select CPU_FREQ_TABLE
depends on X86_32 && EXPERIMENTAL
depends on X86_32
help
This adds the CPUFreq driver for VIA C7 processors.

2
arch/x86/kernel/cpu/cpufreq/elanfreq.c
View File

@ -44,7 +44,7 @@ struct s_elan_multiplier {
* It is important that the frequencies
* are listed in ascending order here!
*/
struct s_elan_multiplier elan_multiplier[] = {
static struct s_elan_multiplier elan_multiplier[] = {
{1000, 0x02, 0x18},
{2000, 0x02, 0x10},
{4000, 0x02, 0x08},

112
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -66,7 +66,6 @@ static u32 find_freq_from_fid(u32 fid)
return 800 + (fid * 100);
}
/* Return a frequency in KHz, given an input fid */
static u32 find_khz_freq_from_fid(u32 fid)
{
@ -78,7 +77,6 @@ static u32 find_khz_freq_from_pstate(struct cpufreq_frequency_table *data, u32 p
return data[pstate].frequency;
}
/* Return the vco fid for an input fid
*
* Each "low" fid has corresponding "high" fid, and you can get to "low" fids
@ -166,7 +164,6 @@ static void fidvid_msr_init(void)
wrmsr(MSR_FIDVID_CTL, lo, hi);
}
/* write the new fid value along with the other control fields to the msr */
static int write_new_fid(struct powernow_k8_data *data, u32 fid)
{
@ -740,44 +737,63 @@ static int find_psb_table(struct powernow_k8_data *data)
#ifdef CONFIG_X86_POWERNOW_K8_ACPI
static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index)
{
if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE))
if (!data->acpi_data->state_count || (cpu_family == CPU_HW_PSTATE))
return;
data->irt = (data->acpi_data.states[index].control >> IRT_SHIFT) & IRT_MASK;
data->rvo = (data->acpi_data.states[index].control >> RVO_SHIFT) & RVO_MASK;
data->exttype = (data->acpi_data.states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
data->plllock = (data->acpi_data.states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
data->vidmvs = 1 << ((data->acpi_data.states[index].control >> MVS_SHIFT) & MVS_MASK);
data->vstable = (data->acpi_data.states[index].control >> VST_SHIFT) & VST_MASK;
data->irt = (data->acpi_data->states[index].control >> IRT_SHIFT) & IRT_MASK;
data->rvo = (data->acpi_data->states[index].control >> RVO_SHIFT) & RVO_MASK;
data->exttype = (data->acpi_data->states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
data->plllock = (data->acpi_data->states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
data->vidmvs = 1 << ((data->acpi_data->states[index].control >> MVS_SHIFT) & MVS_MASK);
data->vstable = (data->acpi_data->states[index].control >> VST_SHIFT) & VST_MASK;
}
static struct acpi_processor_performance *acpi_perf_data;
static int preregister_valid;
static int powernow_k8_cpu_preinit_acpi(void)
{
acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
if (!acpi_perf_data)
return -ENODEV;
if (acpi_processor_preregister_performance(acpi_perf_data))
return -ENODEV;
else
preregister_valid = 1;
return 0;
}
static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
{
struct cpufreq_frequency_table *powernow_table;
int ret_val;
int cpu = 0;
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
data->acpi_data = percpu_ptr(acpi_perf_data, cpu);
if (acpi_processor_register_performance(data->acpi_data, data->cpu)) {
dprintk("register performance failed: bad ACPI data\n");
return -EIO;
}
/* verify the data contained in the ACPI structures */
if (data->acpi_data.state_count <= 1) {
if (data->acpi_data->state_count <= 1) {
dprintk("No ACPI P-States\n");
goto err_out;
}
if ((data->acpi_data.control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
(data->acpi_data.status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
if ((data->acpi_data->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
(data->acpi_data->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
dprintk("Invalid control/status registers (%x - %x)\n",
data->acpi_data.control_register.space_id,
data->acpi_data.status_register.space_id);
data->acpi_data->control_register.space_id,
data->acpi_data->status_register.space_id);
goto err_out;
}
/* fill in data->powernow_table */
powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
* (data->acpi_data.state_count + 1)), GFP_KERNEL);
* (data->acpi_data->state_count + 1)), GFP_KERNEL);
if (!powernow_table) {
dprintk("powernow_table memory alloc failure\n");
goto err_out;
@ -790,12 +806,12 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
if (ret_val)
goto err_out_mem;
powernow_table[data->acpi_data.state_count].frequency = CPUFREQ_TABLE_END;
powernow_table[data->acpi_data.state_count].index = 0;
powernow_table[data->acpi_data->state_count].frequency = CPUFREQ_TABLE_END;
powernow_table[data->acpi_data->state_count].index = 0;
data->powernow_table = powernow_table;
/* fill in data */
data->numps = data->acpi_data.state_count;
data->numps = data->acpi_data->state_count;
if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
print_basics(data);
powernow_k8_acpi_pst_values(data, 0);
@ -803,16 +819,31 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
/* determine affinity, from ACPI if available */
if (preregister_valid) {
if ((data->acpi_data->shared_type == CPUFREQ_SHARED_TYPE_ALL) ||
(data->acpi_data->shared_type == CPUFREQ_SHARED_TYPE_ANY))
data->starting_core_affinity = data->acpi_data->shared_cpu_map;
else
data->starting_core_affinity = cpumask_of_cpu(data->cpu);
} else {
/* best guess from family if not */
if (cpu_family == CPU_HW_PSTATE)
data->starting_core_affinity = cpumask_of_cpu(data->cpu);
else
data->starting_core_affinity = per_cpu(cpu_core_map, data->cpu);
}
return 0;
err_out_mem:
kfree(powernow_table);
err_out:
acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
acpi_processor_unregister_performance(data->acpi_data, data->cpu);
/* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */
data->acpi_data.state_count = 0;
data->acpi_data->state_count = 0;
return -ENODEV;
}
@ -824,10 +855,10 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpuf
rdmsr(MSR_PSTATE_CUR_LIMIT, hi, lo);
data->max_hw_pstate = (hi & HW_PSTATE_MAX_MASK) >> HW_PSTATE_MAX_SHIFT;
for (i = 0; i < data->acpi_data.state_count; i++) {
for (i = 0; i < data->acpi_data->state_count; i++) {
u32 index;
index = data->acpi_data.states[i].control & HW_PSTATE_MASK;
index = data->acpi_data->states[i].control & HW_PSTATE_MASK;
if (index > data->max_hw_pstate) {
printk(KERN_ERR PFX "invalid pstate %d - bad value %d.\n", i, index);
printk(KERN_ERR PFX "Please report to BIOS manufacturer\n");
@ -843,7 +874,7 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpuf
powernow_table[i].index = index;
powernow_table[i].frequency = data->acpi_data.states[i].core_frequency * 1000;
powernow_table[i].frequency = data->acpi_data->states[i].core_frequency * 1000;
}
return 0;
}
@ -852,16 +883,16 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
{
int i;
int cntlofreq = 0;
for (i = 0; i < data->acpi_data.state_count; i++) {
for (i = 0; i < data->acpi_data->state_count; i++) {
u32 fid;
u32 vid;
if (data->exttype) {
fid = data->acpi_data.states[i].status & EXT_FID_MASK;
vid = (data->acpi_data.states[i].status >> VID_SHIFT) & EXT_VID_MASK;
fid = data->acpi_data->states[i].status & EXT_FID_MASK;
vid = (data->acpi_data->states[i].status >> VID_SHIFT) & EXT_VID_MASK;
} else {
fid = data->acpi_data.states[i].control & FID_MASK;
vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK;
fid = data->acpi_data->states[i].control & FID_MASK;
vid = (data->acpi_data->states[i].control >> VID_SHIFT) & VID_MASK;
}
dprintk(" %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
@ -902,10 +933,10 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
cntlofreq = i;
}
if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) {
if (powernow_table[i].frequency != (data->acpi_data->states[i].core_frequency * 1000)) {
printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n",
powernow_table[i].frequency,
(unsigned int) (data->acpi_data.states[i].core_frequency * 1000));
(unsigned int) (data->acpi_data->states[i].core_frequency * 1000));
powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
continue;
}
@ -915,11 +946,12 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
{
if (data->acpi_data.state_count)
acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
if (data->acpi_data->state_count)
acpi_processor_unregister_performance(data->acpi_data, data->cpu);
}
#else
static int powernow_k8_cpu_preinit_acpi(void) { return -ENODEV; }
static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) { return -ENODEV; }
static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data) { return; }
static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index) { return; }
@ -1104,7 +1136,7 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data;
cpumask_t oldmask;
cpumask_t oldmask = CPU_MASK_ALL;
int rc;
if (!cpu_online(pol->cpu))
@ -1177,10 +1209,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
/* run on any CPU again */
set_cpus_allowed_ptr(current, &oldmask);
if (cpu_family == CPU_HW_PSTATE)
pol->cpus = cpumask_of_cpu(pol->cpu);
else
pol->cpus = per_cpu(cpu_core_map, pol->cpu);
pol->cpus = data->starting_core_affinity;
data->available_cores = &(pol->cpus);
/* Take a crude guess here.
@ -1303,6 +1332,7 @@ static int __cpuinit powernowk8_init(void)
}
if (supported_cpus == num_online_cpus()) {
powernow_k8_cpu_preinit_acpi();
printk(KERN_INFO PFX "Found %d %s "
"processors (%d cpu cores) (" VERSION ")\n",
num_online_nodes(),
@ -1319,6 +1349,10 @@ static void __exit powernowk8_exit(void)
dprintk("exit\n");
cpufreq_unregister_driver(&cpufreq_amd64_driver);
#ifdef CONFIG_X86_POWERNOW_K8_ACPI
free_percpu(acpi_perf_data);
#endif
}
MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com>");

3
arch/x86/kernel/cpu/cpufreq/powernow-k8.h
View File

@ -33,12 +33,13 @@ struct powernow_k8_data {
#ifdef CONFIG_X86_POWERNOW_K8_ACPI
/* the acpi table needs to be kept. it's only available if ACPI was
* used to determine valid frequency/vid/fid states */
struct acpi_processor_performance acpi_data;
struct acpi_processor_performance *acpi_data;
#endif
/* we need to keep track of associated cores, but let cpufreq
* handle hotplug events - so just point at cpufreq pol->cpus
* structure */
cpumask_t *available_cores;
cpumask_t starting_core_affinity;
};

20
drivers/cpufreq/cpufreq_conservative.c
View File

@ -333,7 +333,7 @@ static void dbs_check_cpu(int cpu)
{
unsigned int idle_ticks, up_idle_ticks, down_idle_ticks;
unsigned int tmp_idle_ticks, total_idle_ticks;
unsigned int freq_step;
unsigned int freq_target;
unsigned int freq_down_sampling_rate;
struct cpu_dbs_info_s *this_dbs_info = &per_cpu(cpu_dbs_info, cpu);
struct cpufreq_policy *policy;
@ -383,13 +383,13 @@ static void dbs_check_cpu(int cpu)
if (this_dbs_info->requested_freq == policy->max)
return;
freq_step = (dbs_tuners_ins.freq_step * policy->max) / 100;
freq_target = (dbs_tuners_ins.freq_step * policy->max) / 100;
/* max freq cannot be less than 100. But who knows.... */
if (unlikely(freq_step == 0))
freq_step = 5;
if (unlikely(freq_target == 0))
freq_target = 5;
this_dbs_info->requested_freq += freq_step;
this_dbs_info->requested_freq += freq_target;
if (this_dbs_info->requested_freq > policy->max)
this_dbs_info->requested_freq = policy->max;
@ -425,19 +425,19 @@ static void dbs_check_cpu(int cpu)
/*
* if we are already at the lowest speed then break out early
* or if we 'cannot' reduce the speed as the user might want
* freq_step to be zero
* freq_target to be zero
*/
if (this_dbs_info->requested_freq == policy->min
|| dbs_tuners_ins.freq_step == 0)
return;
freq_step = (dbs_tuners_ins.freq_step * policy->max) / 100;
freq_target = (dbs_tuners_ins.freq_step * policy->max) / 100;
/* max freq cannot be less than 100. But who knows.... */
if (unlikely(freq_step == 0))
freq_step = 5;
if (unlikely(freq_target == 0))
freq_target = 5;
this_dbs_info->requested_freq -= freq_step;
this_dbs_info->requested_freq -= freq_target;
if (this_dbs_info->requested_freq < policy->min)
this_dbs_info->requested_freq = policy->min;