#ifndef UDLFB_H #define UDLFB_H /* * TODO: Propose standard fb.h ioctl for reporting damage, * using _IOWR() and one of the existing area structs from fb.h * Consider these ioctls deprecated, but they're still used by the * DisplayLink X server as yet - need both to be modified in tandem * when new ioctl(s) are ready. */ #define DLFB_IOCTL_RETURN_EDID 0xAD #define DLFB_IOCTL_REPORT_DAMAGE 0xAA struct dloarea { int x, y; int w, h; int x2, y2; }; struct urb_node { struct list_head entry; struct dlfb_data *dev; struct delayed_work release_urb_work; struct urb *urb; }; struct urb_list { struct list_head list; spinlock_t lock; struct semaphore limit_sem; int available; int count; size_t size; }; struct dlfb_data { struct usb_device *udev; struct device *gdev; /* &udev->dev */ struct fb_info *info; struct urb_list urbs; struct kref kref; char *backing_buffer; int fb_count; bool virtualized; /* true when physical usb device not present */ struct delayed_work init_framebuffer_work; struct delayed_work free_framebuffer_work; atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ char *edid; /* null until we read edid from hw or get from sysfs */ size_t edid_size; int sku_pixel_limit; int base16; int base8; u32 pseudo_palette[256]; int blank_mode; /*one of FB_BLANK_ */ /* blit-only rendering path metrics, exposed through sysfs */ atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ atomic_t bytes_identical; /* saved effort with backbuffer comparison */ atomic_t bytes_sent; /* to usb, after compression including overhead */ atomic_t cpu_kcycles_used; /* transpired during pixel processing */ }; #define NR_USB_REQUEST_I2C_SUB_IO 0x02 #define NR_USB_REQUEST_CHANNEL 0x12 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ #define BULK_SIZE 512 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) #define WRITES_IN_FLIGHT (4) #define MAX_VENDOR_DESCRIPTOR_SIZE 256 #define GET_URB_TIMEOUT HZ #define FREE_URB_TIMEOUT (HZ*2) #define BPP 2 #define MAX_CMD_PIXELS 255 #define RLX_HEADER_BYTES 7 #define MIN_RLX_PIX_BYTES 4 #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES) #define RLE_HEADER_BYTES 6 #define MIN_RLE_PIX_BYTES 3 #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES) #define RAW_HEADER_BYTES 6 #define MIN_RAW_PIX_BYTES 2 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES) #define DL_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */ #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */ /* remove these once align.h patch is taken into kernel */ #define DL_ALIGN_UP(x, a) ALIGN(x, a) #define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a) #endif
path: root/net/mac802154/llsec.c
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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 /net/mac802154/llsec.c
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 'net/mac802154/llsec.c')