/****************************************************************************** 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 '>unified
Diffstat (limited to 'include/net/tcp_states.h')
class='oid'>54791b276b4000b307339f269d3bf7db877d536f (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /tools/build/Documentation
parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)
parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/build/Documentation')