/* * Analog Devices PPI header file * * Copyright (c) 2011 Analog Devices Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _PPI_H_ #define _PPI_H_ #include #include #include /* EPPI */ #ifdef EPPI_EN #define PORT_EN EPPI_EN #define PORT_DIR EPPI_DIR #define DMA32 0 #define PACK_EN PACKEN #endif /* EPPI3 */ #ifdef EPPI0_CTL2 #define PORT_EN EPPI_CTL_EN #define PORT_DIR EPPI_CTL_DIR #define PACK_EN EPPI_CTL_PACKEN #define DMA32 0 #define DLEN_8 EPPI_CTL_DLEN08 #define DLEN_16 EPPI_CTL_DLEN16 #endif struct ppi_if; struct ppi_params { u32 width; /* width in pixels */ u32 height; /* height in lines */ u32 hdelay; /* delay after the HSYNC in pixels */ u32 vdelay; /* delay after the VSYNC in lines */ u32 line; /* total pixels per line */ u32 frame; /* total lines per frame */ u32 hsync; /* HSYNC length in pixels */ u32 vsync; /* VSYNC length in lines */ int bpp; /* bits per pixel */ int dlen; /* data length for ppi in bits */ u32 ppi_control; /* ppi configuration */ u32 int_mask; /* interrupt mask */ }; struct ppi_ops { int (*attach_irq)(struct ppi_if *ppi, irq_handler_t handler); void (*detach_irq)(struct ppi_if *ppi); int (*start)(struct ppi_if *ppi); int (*stop)(struct ppi_if *ppi); int (*set_params)(struct ppi_if *ppi, struct ppi_params *params); void (*update_addr)(struct ppi_if *ppi, unsigned long addr); }; enum ppi_type { PPI_TYPE_PPI, PPI_TYPE_EPPI, PPI_TYPE_EPPI3, }; struct ppi_info { enum ppi_type type; int dma_ch; int irq_err; void __iomem *base; const unsigned short *pin_req; }; struct ppi_if { struct device *dev; unsigned long ppi_control; const struct ppi_ops *ops; const struct ppi_info *info; bool err_int; /* if we need request error interrupt */ bool err; /* if ppi has fifo error */ void *priv; }; struct ppi_if *ppi_create_instance(struct platform_device *pdev, const struct ppi_info *info); void ppi_delete_instance(struct ppi_if *ppi); #endif a href='/cgit.cgi/linux/net-next.git/commit/?id=54791b276b4000b307339f269d3bf7db877d536f'>root/include/drm/drm_framebuffer.h
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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_framebuffer.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_framebuffer.h')