/* * This header provides macros for at91 dma bindings. * * Copyright (C) 2013 Ludovic Desroches * * GPLv2 only */ #ifndef __DT_BINDINGS_AT91_DMA_H__ #define __DT_BINDINGS_AT91_DMA_H__ /* ---------- HDMAC ---------- */ /* * Source and/or destination peripheral ID */ #define AT91_DMA_CFG_PER_ID_MASK (0xff) #define AT91_DMA_CFG_PER_ID(id) (id & AT91_DMA_CFG_PER_ID_MASK) /* * FIFO configuration: it defines when a request is serviced. */ #define AT91_DMA_CFG_FIFOCFG_OFFSET (8) #define AT91_DMA_CFG_FIFOCFG_MASK (0xf << AT91_DMA_CFG_FIFOCFG_OFFSET) #define AT91_DMA_CFG_FIFOCFG_HALF (0x0 << AT91_DMA_CFG_FIFOCFG_OFFSET) /* half FIFO (default behavior) */ #define AT91_DMA_CFG_FIFOCFG_ALAP (0x1 << AT91_DMA_CFG_FIFOCFG_OFFSET) /* largest defined AHB burst */ #define AT91_DMA_CFG_FIFOCFG_ASAP (0x2 << AT91_DMA_CFG_FIFOCFG_OFFSET) /* single AHB access */ /* ---------- XDMAC ---------- */ #define AT91_XDMAC_DT_MEM_IF_MASK (0x1) #define AT91_XDMAC_DT_MEM_IF_OFFSET (13) #define AT91_XDMAC_DT_MEM_IF(mem_if) (((mem_if) & AT91_XDMAC_DT_MEM_IF_MASK) \ << AT91_XDMAC_DT_MEM_IF_OFFSET) #define AT91_XDMAC_DT_GET_MEM_IF(cfg) (((cfg) >> AT91_XDMAC_DT_MEM_IF_OFFSET) \ & AT91_XDMAC_DT_MEM_IF_MASK) #define AT91_XDMAC_DT_PER_IF_MASK (0x1) #define AT91_XDMAC_DT_PER_IF_OFFSET (14) #define AT91_XDMAC_DT_PER_IF(per_if) (((per_if) & AT91_XDMAC_DT_PER_IF_MASK) \ << AT91_XDMAC_DT_PER_IF_OFFSET) #define AT91_XDMAC_DT_GET_PER_IF(cfg) (((cfg) >> AT91_XDMAC_DT_PER_IF_OFFSET) \ & AT91_XDMAC_DT_PER_IF_MASK) #define AT91_XDMAC_DT_PERID_MASK (0x7f) #define AT91_XDMAC_DT_PERID_OFFSET (24) #define AT91_XDMAC_DT_PERID(perid) (((perid) & AT91_XDMAC_DT_PERID_MASK) \ << AT91_XDMAC_DT_PERID_OFFSET) #define AT91_XDMAC_DT_GET_PERID(cfg) (((cfg) >> AT91_XDMAC_DT_PERID_OFFSET) \ & AT91_XDMAC_DT_PERID_MASK) #endif /* __DT_BINDINGS_AT91_DMA_H__ */ 0edf1ff6b97425d9548f27385ac7b4921f5a0'>treecommitdiff
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authorDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
commit54791b276b4000b307339f269d3bf7db877d536f (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /include/drm/drm_gem_cma_helper.h
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 'include/drm/drm_gem_cma_helper.h')