+
/*
* (c) 2003-2006 Advanced Micro Devices, Inc.
* Your use of this code is subject to the terms and conditions of the
#include <asm/msr.h>
-#ifdef CONFIG_X86_POWERNOW_K8_ACPI
#include <linux/acpi.h>
#include <linux/mutex.h>
#include <acpi/processor.h>
-#endif
#define PFX "powernow-k8: "
#define VERSION "version 2.20.00"
static int cpu_family = CPU_OPTERON;
#ifndef CONFIG_SMP
-DEFINE_PER_CPU(cpumask_t, cpu_core_map);
+static inline const struct cpumask *cpu_core_mask(int cpu)
+{
+ return cpumask_of(0);
+}
#endif
/* Return a frequency in MHz, given an input fid */
data->batps);
}
+static u32 freq_from_fid_did(u32 fid, u32 did)
+{
+ u32 mhz = 0;
+
+ if (boot_cpu_data.x86 == 0x10)
+ mhz = (100 * (fid + 0x10)) >> did;
+ else if (boot_cpu_data.x86 == 0x11)
+ mhz = (100 * (fid + 8)) >> did;
+ else
+ BUG();
+
+ return mhz * 1000;
+}
+
static int fill_powernow_table(struct powernow_k8_data *data,
struct pst_s *pst, u8 maxvid)
{
dprintk("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
data->powernow_table = powernow_table;
- if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
+ if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
print_basics(data);
for (j = 0; j < data->numps; j++)
* BIOS and Kernel Developer's Guide, which is available on
* www.amd.com
*/
- printk(KERN_ERR PFX "BIOS error - no PSB or ACPI _PSS objects\n");
+ printk(KERN_ERR FW_BUG PFX "No PSB or ACPI _PSS objects\n");
return -ENODEV;
}
-#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))
return;
- control = data->acpi_data.states[index].control; data->irt = (control
- >> IRT_SHIFT) & IRT_MASK; data->rvo = (control >>
- RVO_SHIFT) & RVO_MASK; data->exttype = (control
- >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
- data->plllock = (control >> PLL_L_SHIFT) & PLL_L_MASK; data->vidmvs = 1
- << ((control >> MVS_SHIFT) & MVS_MASK); data->vstable =
- (control >> VST_SHIFT) & VST_MASK; }
+ control = data->acpi_data.states[index].control;
+ data->irt = (control >> IRT_SHIFT) & IRT_MASK;
+ data->rvo = (control >> RVO_SHIFT) & RVO_MASK;
+ data->exttype = (control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
+ data->plllock = (control >> PLL_L_SHIFT) & PLL_L_MASK;
+ data->vidmvs = 1 << ((control >> MVS_SHIFT) & MVS_MASK);
+ data->vstable = (control >> VST_SHIFT) & VST_MASK;
+}
static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
{
struct cpufreq_frequency_table *powernow_table;
int ret_val = -ENODEV;
- acpi_integer space_id;
+ acpi_integer control, status;
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
dprintk("register performance failed: bad ACPI data\n");
goto err_out;
}
- space_id = data->acpi_data.control_register.space_id;
- if ((space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
- (space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
+ control = data->acpi_data.control_register.space_id;
+ status = data->acpi_data.status_register.space_id;
+
+ if ((control != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
+ (status != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
dprintk("Invalid control/status registers (%x - %x)\n",
- data->acpi_data.control_register.space_id,
- space_id);
+ control, status);
goto err_out;
}
/* fill in data */
data->numps = data->acpi_data.state_count;
- if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
+ if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
print_basics(data);
powernow_k8_acpi_pst_values(data, 0);
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
- if (!alloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
+ if (!zalloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
printk(KERN_ERR PFX
"unable to alloc powernow_k8_data cpumask\n");
ret_val = -ENOMEM;
powernow_table[i].index = index;
- powernow_table[i].frequency =
- data->acpi_data.states[i].core_frequency * 1000;
+ /* Frequency may be rounded for these */
+ if (boot_cpu_data.x86 == 0x10 || boot_cpu_data.x86 == 0x11) {
+ powernow_table[i].frequency =
+ freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7);
+ } else
+ powernow_table[i].frequency =
+ data->acpi_data.states[i].core_frequency * 1000;
}
return 0;
}
if (cur_latency > max_latency)
max_latency = cur_latency;
}
+ if (max_latency == 0) {
+ /*
+ * Fam 11h always returns 0 as transition latency.
+ * This is intended and means "very fast". While cpufreq core
+ * and governors currently can handle that gracefully, better
+ * set it to 1 to avoid problems in the future.
+ * For all others it's a BIOS bug.
+ */
+ if (!boot_cpu_data.x86 == 0x11)
+ printk(KERN_ERR FW_WARN PFX "Invalid zero transition "
+ "latency\n");
+ max_latency = 1;
+ }
/* value in usecs, needs to be in nanoseconds */
return 1000 * max_latency;
}
-#else
-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;
-}
-static int get_transition_latency(struct powernow_k8_data *data) { return 0; }
-#endif /* CONFIG_X86_POWERNOW_K8_ACPI */
-
/* Take a frequency, and issue the fid/vid transition command */
static int transition_frequency_fidvid(struct powernow_k8_data *data,
unsigned int index)
/* per CPU init entry point to the driver */
static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{
+ static const char ACPI_PSS_BIOS_BUG_MSG[] =
+ KERN_ERR FW_BUG PFX "No compatible ACPI _PSS objects found.\n"
+ KERN_ERR FW_BUG PFX "Try again with latest BIOS.\n";
struct powernow_k8_data *data;
cpumask_t oldmask;
int rc;
* an UP version, and is deprecated by AMD.
*/
if (num_online_cpus() != 1) {
-#ifndef CONFIG_ACPI_PROCESSOR
- printk(KERN_ERR PFX
- "ACPI Processor support is required for "
- "SMP systems but is absent. Please load the "
- "ACPI Processor module before starting this "
- "driver.\n");
-#else
- printk(KERN_ERR FW_BUG PFX "Your BIOS does not provide"
- " ACPI _PSS objects in a way that Linux "
- "understands. Please report this to the Linux "
- "ACPI maintainers and complain to your BIOS "
- "vendor.\n");
-#endif
- kfree(data);
- return -ENODEV;
+ printk_once(ACPI_PSS_BIOS_BUG_MSG);
+ goto err_out;
}
if (pol->cpu != 0) {
printk(KERN_ERR FW_BUG PFX "No ACPI _PSS objects for "
"CPU other than CPU0. Complain to your BIOS "
"vendor.\n");
- kfree(data);
- return -ENODEV;
+ goto err_out;
}
rc = find_psb_table(data);
- if (rc) {
- kfree(data);
- return -ENODEV;
- }
+ if (rc)
+ goto err_out;
+
/* Take a crude guess here.
* That guess was in microseconds, so multiply with 1000 */
pol->cpuinfo.transition_latency = (
if (smp_processor_id() != pol->cpu) {
printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
- goto err_out;
+ goto err_out_unmask;
}
if (pending_bit_stuck()) {
printk(KERN_ERR PFX "failing init, change pending bit set\n");
- goto err_out;
+ goto err_out_unmask;
}
if (query_current_values_with_pending_wait(data))
- goto err_out;
+ goto err_out_unmask;
if (cpu_family == CPU_OPTERON)
fidvid_msr_init();
if (cpu_family == CPU_HW_PSTATE)
cpumask_copy(pol->cpus, cpumask_of(pol->cpu));
else
- cpumask_copy(pol->cpus, &per_cpu(cpu_core_map, pol->cpu));
+ cpumask_copy(pol->cpus, cpu_core_mask(pol->cpu));
data->available_cores = pol->cpus;
if (cpu_family == CPU_HW_PSTATE)
return 0;
-err_out:
+err_out_unmask:
set_cpus_allowed_ptr(current, &oldmask);
powernow_k8_cpu_exit_acpi(data);
+err_out:
kfree(data);
return -ENODEV;
}
unsigned int khz = 0;
unsigned int first;
- first = first_cpu(per_cpu(cpu_core_map, cpu));
+ first = cpumask_first(cpu_core_mask(cpu));
data = per_cpu(powernow_data, first);
if (!data)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff