/* * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC. * * Copyright (C) 2005 SAN People * Copyright (C) 2008 Atmel * * Authors: Sedji Gaouaou * * Based on at91-pcm. by: * Frank Mandarino * Copyright 2006 Endrelia Technologies Inc. * * Based on pxa2xx-pcm.c by: * * Author: Nicolas Pitre * Created: Nov 30, 2004 * Copyright: (C) 2004 MontaVista Software, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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 */ #ifndef _ATMEL_PCM_H #define _ATMEL_PCM_H #include #define ATMEL_SSC_DMABUF_SIZE (64 * 1024) /* * Registers and status bits that are required by the PCM driver. */ struct atmel_pdc_regs { unsigned int xpr; /* PDC recv/trans pointer */ unsigned int xcr; /* PDC recv/trans counter */ unsigned int xnpr; /* PDC next recv/trans pointer */ unsigned int xncr; /* PDC next recv/trans counter */ unsigned int ptcr; /* PDC transfer control */ }; struct atmel_ssc_mask { u32 ssc_enable; /* SSC recv/trans enable */ u32 ssc_disable; /* SSC recv/trans disable */ u32 ssc_error; /* SSC error conditions */ u32 ssc_endx; /* SSC ENDTX or ENDRX */ u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ u32 pdc_enable; /* PDC recv/trans enable */ u32 pdc_disable; /* PDC recv/trans disable */ }; /* * This structure, shared between the PCM driver and the interface, * contains all information required by the PCM driver to perform the * PDC DMA operation. All fields except dma_intr_handler() are initialized * by the interface. The dma_intr_handler() pointer is set by the PCM * driver and called by the interface SSC interrupt handler if it is * non-NULL. */ struct atmel_pcm_dma_params { char *name; /* stream identifier */ int pdc_xfer_size; /* PDC counter increment in bytes */ struct ssc_device *ssc; /* SSC device for stream */ struct atmel_pdc_regs *pdc; /* PDC receive or transmit registers */ struct atmel_ssc_mask *mask; /* SSC & PDC status bits */ struct snd_pcm_substream *substream; void (*dma_intr_handler)(u32, struct snd_pcm_substream *); }; /* * SSC register access (since ssc_writel() / ssc_readl() require literal name) */ #define ssc_readx(base, reg) (__raw_readl((base) + (reg))) #define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg)) #if defined(CONFIG_SND_ATMEL_SOC_PDC) || \ defined(CONFIG_SND_ATMEL_SOC_PDC_MODULE) int atmel_pcm_pdc_platform_register(struct device *dev); void atmel_pcm_pdc_platform_unregister(struct device *dev); #else static inline int atmel_pcm_pdc_platform_register(struct device *dev) { return 0; } static inline void atmel_pcm_pdc_platform_unregister(struct device *dev) { } #endif #if defined(CONFIG_SND_ATMEL_SOC_DMA) || \ defined(CONFIG_SND_ATMEL_SOC_DMA_MODULE) int atmel_pcm_dma_platform_register(struct device *dev); void atmel_pcm_dma_platform_unregister(struct device *dev); #else static inline int atmel_pcm_dma_platform_register(struct device *dev) { return 0; } static inline void atmel_pcm_dma_platform_unregister(struct device *dev) { } #endif #endif /* _ATMEL_PCM_H */ submit();'>space:mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/net/dst.h
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/net/dst.h')