/* * sound/oss/dev_table.c * * Device call tables. * * * Copyright (C) by Hannu Savolainen 1993-1997 * * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) * Version 2 (June 1991). See the "COPYING" file distributed with this software * for more info. */ #include #include "sound_config.h" struct audio_operations *audio_devs[MAX_AUDIO_DEV]; EXPORT_SYMBOL(audio_devs); int num_audiodevs; EXPORT_SYMBOL(num_audiodevs); struct mixer_operations *mixer_devs[MAX_MIXER_DEV]; EXPORT_SYMBOL(mixer_devs); int num_mixers; EXPORT_SYMBOL(num_mixers); struct synth_operations *synth_devs[MAX_SYNTH_DEV+MAX_MIDI_DEV]; EXPORT_SYMBOL(synth_devs); int num_synths; struct midi_operations *midi_devs[MAX_MIDI_DEV]; EXPORT_SYMBOL(midi_devs); int num_midis; EXPORT_SYMBOL(num_midis); struct sound_timer_operations *sound_timer_devs[MAX_TIMER_DEV] = { &default_sound_timer, NULL }; EXPORT_SYMBOL(sound_timer_devs); int num_sound_timers = 1; static int sound_alloc_audiodev(void); int sound_install_audiodrv(int vers, char *name, struct audio_driver *driver, int driver_size, int flags, unsigned int format_mask, void *devc, int dma1, int dma2) { struct audio_driver *d; struct audio_operations *op; int num; if (vers != AUDIO_DRIVER_VERSION || driver_size > sizeof(struct audio_driver)) { printk(KERN_ERR "Sound: Incompatible audio driver for %s\n", name); return -EINVAL; } num = sound_alloc_audiodev(); if (num == -1) { printk(KERN_ERR "sound: Too many audio drivers\n"); return -EBUSY; } d = (struct audio_driver *) (sound_mem_blocks[sound_nblocks] = vmalloc(sizeof(struct audio_driver))); sound_nblocks++; if (sound_nblocks >= MAX_MEM_BLOCKS) sound_nblocks = MAX_MEM_BLOCKS - 1; op = (struct audio_operations *) (sound_mem_blocks[sound_nblocks] = vzalloc(sizeof(struct audio_operations))); sound_nblocks++; if (sound_nblocks >= MAX_MEM_BLOCKS) sound_nblocks = MAX_MEM_BLOCKS - 1; if (d == NULL || op == NULL) { printk(KERN_ERR "Sound: Can't allocate driver for (%s)\n", name); sound_unload_audiodev(num); return -ENOMEM; } init_waitqueue_head(&op->in_sleeper); init_waitqueue_head(&op->out_sleeper); init_waitqueue_head(&op->poll_sleeper); if (driver_size < sizeof(struct audio_driver)) memset((char *) d, 0, sizeof(struct audio_driver)); memcpy((char *) d, (char *) driver, driver_size); op->d = d; strlcpy(op->name, name, sizeof(op->name)); op->flags = flags; op->format_mask = format_mask; op->devc = devc; /* * Hardcoded defaults */ audio_devs[num] = op; DMAbuf_init(num, dma1, dma2); audio_init_devices(); return num; } EXPORT_SYMBOL(sound_install_audiodrv); int sound_install_mixer(int vers, char *name, struct mixer_operations *driver, int driver_size, void *devc) { struct mixer_operations *op; int n = sound_alloc_mixerdev(); if (n == -1) { printk(KERN_ERR "Sound: Too many mixer drivers\n"); return -EBUSY; } if (vers != MIXER_DRIVER_VERSION || driver_size > sizeof(struct mixer_operations)) { printk(KERN_ERR "Sound: Incompatible mixer driver for %s\n", name); return -EINVAL; } /* FIXME: This leaks a mixer_operations struct every time its called until you unload sound! */ op = (struct mixer_operations *) (sound_mem_blocks[sound_nblocks] = vzalloc(sizeof(struct mixer_operations))); sound_nblocks++; if (sound_nblocks >= MAX_MEM_BLOCKS) sound_nblocks = MAX_MEM_BLOCKS - 1; if (op == NULL) { printk(KERN_ERR "Sound: Can't allocate mixer driver for (%s)\n", name); return -ENOMEM; } memcpy((char *) op, (char *) driver, driver_size); strlcpy(op->name, name, sizeof(op->name)); op->devc = devc; mixer_devs[n] = op; return n; } EXPORT_SYMBOL(sound_install_mixer); void sound_unload_audiodev(int dev) { if (dev != -1) { DMAbuf_deinit(dev); audio_devs[dev] = NULL; unregister_sound_dsp((dev<<4)+3); } } EXPORT_SYMBOL(sound_unload_audiodev); static int sound_alloc_audiodev(void) { int i = register_sound_dsp(&oss_sound_fops, -1); if(i==-1) return i; i>>=4; if(i>=num_audiodevs) num_audiodevs = i + 1; return i; } int sound_alloc_mididev(void) { int i = register_sound_midi(&oss_sound_fops, -1); if(i==-1) return i; i>>=4; if(i>=num_midis) num_midis = i + 1; return i; } EXPORT_SYMBOL(sound_alloc_mididev); int sound_alloc_synthdev(void) { int i; for (i = 0; i < MAX_SYNTH_DEV; i++) { if (synth_devs[i] == NULL) { if (i >= num_synths) num_synths++; return i; } } return -1; } EXPORT_SYMBOL(sound_alloc_synthdev); int sound_alloc_mixerdev(void) { int i = register_sound_mixer(&oss_sound_fops, -1); if(i==-1) return -1; i>>=4; if(i>=num_mixers) num_mixers = i + 1; return i; } EXPORT_SYMBOL(sound_alloc_mixerdev); int sound_alloc_timerdev(void) { int i; for (i = 0; i < MAX_TIMER_DEV; i++) { if (sound_timer_devs[i] == NULL) { if (i >= num_sound_timers) num_sound_timers++; return i; } } return -1; } EXPORT_SYMBOL(sound_alloc_timerdev); void sound_unload_mixerdev(int dev) { if (dev != -1) { mixer_devs[dev] = NULL; unregister_sound_mixer(dev<<4); num_mixers--; } } EXPORT_SYMBOL(sound_unload_mixerdev); void sound_unload_mididev(int dev) { if (dev != -1) { midi_devs[dev] = NULL; unregister_sound_midi((dev<<4)+2); } } EXPORT_SYMBOL(sound_unload_mididev); void sound_unload_synthdev(int dev) { if (dev != -1) synth_devs[dev] = NULL; } EXPORT_SYMBOL(sound_unload_synthdev); void sound_unload_timerdev(int dev) { if (dev != -1) sound_timer_devs[dev] = NULL; } EXPORT_SYMBOL(sound_unload_timerdev); ve&id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>sound/arm parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'sound/arm')