/****************************************************************************** AudioScience HPI driver Copyright (C) 1997-2011 AudioScience Inc. This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation; This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA HPI Operating System Specific macros for Linux Kernel driver (C) Copyright AudioScience Inc. 1997-2003 ******************************************************************************/ #ifndef _HPIOS_H_ #define _HPIOS_H_ #undef HPI_OS_LINUX_KERNEL #define HPI_OS_LINUX_KERNEL #define HPI_OS_DEFINED #define HPI_BUILD_KERNEL_MODE #include #include #include #include #include #include #include #include #include #define HPI_NO_OS_FILE_OPS /** Details of a memory area allocated with pci_alloc_consistent Need all info for parameters to pci_free_consistent */ struct consistent_dma_area { struct device *pdev; /* looks like dma-mapping dma_devres ?! */ size_t size; void *vaddr; dma_addr_t dma_handle; }; static inline u16 hpios_locked_mem_get_phys_addr(struct consistent_dma_area *locked_mem_handle, u32 *p_physical_addr) { *p_physical_addr = locked_mem_handle->dma_handle; return 0; } static inline u16 hpios_locked_mem_get_virt_addr(struct consistent_dma_area *locked_mem_handle, void **pp_virtual_addr) { *pp_virtual_addr = locked_mem_handle->vaddr; return 0; } static inline u16 hpios_locked_mem_valid(struct consistent_dma_area *locked_mem_handle) { return locked_mem_handle->size != 0; } struct hpi_ioctl_linux { void __user *phm; void __user *phr; }; /* Conflict?: H is already used by a number of drivers hid, bluetooth hci, and some sound drivers sb16, hdsp, emu10k. AFAIK 0xFC is ununsed command */ #define HPI_IOCTL_LINUX _IOWR('H', 0xFC, struct hpi_ioctl_linux) #define HPI_DEBUG_FLAG_ERROR KERN_ERR #define HPI_DEBUG_FLAG_WARNING KERN_WARNING #define HPI_DEBUG_FLAG_NOTICE KERN_NOTICE #define HPI_DEBUG_FLAG_INFO KERN_INFO #define HPI_DEBUG_FLAG_DEBUG KERN_DEBUG #define HPI_DEBUG_FLAG_VERBOSE KERN_DEBUG /* kernel has no verbose */ #include #define HPI_LOCKING struct hpios_spinlock { spinlock_t lock; /* SEE hpios_spinlock */ int lock_context; }; /* The reason for all this evilness is that ALSA calls some of a drivers * operators in atomic context, and some not. But all our functions channel * through the HPI_Message conduit, so we can't handle the different context * per function */ #define IN_LOCK_BH 1 #define IN_LOCK_IRQ 0 static inline void cond_lock(struct hpios_spinlock *l) { if (irqs_disabled()) { /* NO bh or isr can execute on this processor, so ordinary lock will do */ spin_lock(&((l)->lock)); l->lock_context = IN_LOCK_IRQ; } else { spin_lock_bh(&((l)->lock)); l->lock_context = IN_LOCK_BH; } } static inline void cond_unlock(struct hpios_spinlock *l) { if (l->lock_context == IN_LOCK_BH) spin_unlock_bh(&((l)->lock)); else spin_unlock(&((l)->lock)); } #define hpios_msgxlock_init(obj) spin_lock_init(&(obj)->lock) #define hpios_msgxlock_lock(obj) cond_lock(obj) #define hpios_msgxlock_unlock(obj) cond_unlock(obj) #define hpios_dsplock_init(obj) spin_lock_init(&(obj)->dsp_lock.lock) #define hpios_dsplock_lock(obj) cond_lock(&(obj)->dsp_lock) #define hpios_dsplock_unlock(obj) cond_unlock(&(obj)->dsp_lock) #ifdef CONFIG_SND_DEBUG #define HPI_BUILD_DEBUG #endif #define HPI_ALIST_LOCKING #define hpios_alistlock_init(obj) spin_lock_init(&((obj)->list_lock.lock)) #define hpios_alistlock_lock(obj) spin_lock(&((obj)->list_lock.lock)) #define hpios_alistlock_unlock(obj) spin_unlock(&((obj)->list_lock.lock)) struct snd_card; /** pci drvdata points to an instance of this struct */ struct hpi_adapter { struct hpi_adapter_obj *adapter; struct snd_card *snd_card; int irq; int interrupt_mode; void (*interrupt_callback) (struct hpi_adapter *); /* mutex prevents contention for one card between multiple user programs (via ioctl) */ struct mutex mutex; char *p_buffer; size_t buffer_size; }; #endif '>2017-02-04 00:11:08 +0100 commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch) treec666f7a26b860674848949e39a610222b0723f89 /net/rds/ib_sysctl.c 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 'net/rds/ib_sysctl.c')