- Nov 29, 2012
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Alessandro Rubini authored
Signed-off-by:
Alessandro Rubini <rubini@gnudd.com> Acked-by:
Federico Vaga <federico.vaga@gmail.com>
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Alessandro Rubini authored
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Alessandro Rubini authored
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Alessandro Rubini authored
pdftex has the very bad habit of picking png first, so we can't have png images or the pdf version will be horrible. Thus, let's use gif for the html (which is not picked by pdftex) and a .pdf generated by our encapsulated postscript sources. This adds the needed makefile and removes the previous pdf images, which are regenerated in the next commit. We are also adding new images where, including the logo used in the cover. Signed-off-by:
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Alessandro Rubini authored
Parts are still to be written, though. Signed-off-by:
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- Nov 26, 2012
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Alessandro Rubini authored
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- Nov 25, 2012
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Alessandro Rubini authored
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Alessandro Rubini authored
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Alessandro Rubini authored
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Alessandro Rubini authored
While the binary control file in sysfs is a neat feature, the interface to binary attributes was different before 2.6.35. This allows compiling with no warnings (and no crashes if the feature is used) by just disabling the attribute at compile time. Signed-off-by:
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Alessandro Rubini authored
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Alessandro Rubini authored
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- Nov 24, 2012
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Alessandro Rubini authored
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Alessandro Rubini authored
We are getting rid of the "zio-" prefix in all file names. The prefix is needed module names (so all single-file devices triggers and buffers) but not in component files. This simplifies stuff a little for our command lines and tab completion. Signed-off-by:
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Now that both device and trigger/buffer are in objects.c, what was static should return static. Signed-off-by:
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Alessandro Rubini authored
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Alessandro Rubini authored
This also removes the ugly __ZIO_INTERNAL__ define we used until now Signed-off-by:
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- Nov 15, 2012
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if user specifies only one file, zio-dump assumes it to be a control file. Signed-off-by:
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The -n option tells how many blocks to read from the block source. The following example will read 3 blocks from zio-zero, channel 0 ./zio-dump -n 3 /dev/zio/zzero-0000-0-0-* Signed-off-by:
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ZIO creates a binary sysfs attribute named "current-control" within each channel. This attribute allows the user to read the current control of any channel. Signed-off-by:
Alessandro Rubini <rubinig@gnudd.com>
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- Nov 11, 2012
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Federico Vaga authored
The patch 896e0664 misses to assign the zattr for the zio extended attributes. This patch also improve comments to avoid similar errors in the future. Signed-off-by:
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Alessandro Rubini authored
"more_ctrl" is obsoleted by the TLV approach, and I simply forgot to make this change we agreed about. We have two fields for alarm to avoid endian issues when checking for errors system-wide (i.e., in all ZIO devices, including remote ones). The version remains 1.0 as nobody used the fields in their previous meaning. Signed-off-by:
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- Nov 09, 2012
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Alessandro Rubini authored
This changes the control block to version 1.0. It adds a TLV header at the end and renames sockadd_zio to zio_addr (sockaddr_zio must be defined in user space using the dreaded sa_family_t instead of uint16_t). Signed-off-by:
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Alessandro Rubini authored
Now the open() returns -ENODEV at is should. The bug only happens if you are not using udev, though. Original code returned -EBUSY when 0 (== false) was needed. The patch is bigger than that because it simplifies related code. Signed-off-by:
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Alessandro Rubini authored
This is an incompatible change for buffer authors. We don't think there are any out-of-tree buffers, though. The allocation function must allocate the control by itself, instead of receiving it from outside. The reason why the control was passed doesn't hold any more, and the upcoming PF_ZIO buffer will greatly benefit from this. Also, now alloc_block returns NULL on error, so it can be used directly by the caller (it used to be ERR_PTR). Signed-off-by:
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Federico Vaga authored
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Alessandro Rubini authored
zio-mini is a very simple driver, with no attributes, that can be used to get accustomed with how ZIO and the ZIO bus work. You can create as many devices as you want, with as many channels as you want. Each device has only one input cset, that returns the struct timespec collected at raw_io() time. The driver always returns one sample only, even if the trigger asks for more. Signed-off-by:
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Alessandro Rubini authored
This replaces the previous allocation bitmask, which only supported small channel-sets, with the first-fit allocator. Minors are always taken from the smallest available slot starting from minor 0. Each cset is allocated separately, but this should not be a problem. With the zio-mini driver, which is not upstream yet, this works: insmod zio-mini.ko nchan=300 ndev=20 And we get all the devices we need. # ls -1 /sys/dev/char/250:* | wc -l 12000 The patch makes also some other renaming of functions (less underscores for functions exported by zio-cdev.c to zio-sys.c) and similar stuff that makes stuff clearer, if I happened to find them during this change. Signed-off-by: -
Alessandro Rubini authored
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Alessandro Rubini authored
This is a library-like set of functions, but they are not in the kernel, as far as I know, so let's offer them here. We will use them in the vmalloc buffer, in place of the circular buffer we have now, and for allocating minor device numbers. Signed-off-by:
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Alessandro Rubini authored
Only useful to diagnose buf-vmalloc, but _there_ it is useful. Signed-off-by:
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Alessandro Rubini authored
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- Nov 08, 2012
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Alessandro Rubini authored
The driver itself is allowed to change nsamples, because it may have less samples than requested when the trigger fires. This is done by zio-mini, for example, that will be merged soon. Therefore, the number in current_ctrl must be updated, or the previous shorter value will stick. Also, move seq_num incrementing earlier, so even if allocation fails the sequence number is updated (and we need to do alarms too for that). Signed-off-by:
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Alessandro Rubini authored
Cset 4 of zio-loop returns a combined control and data stream to /dev/zio-loop-4-r-ctrldata . The same will soon happen with PF_ZIO sockets, so add "-c" to zio-dump to support combined mode (i.e. control is followed by data). Signed-off-by:
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Alessandro Rubini authored
The driver supports an output cset that loops to an input cset, and two output csets of 1 channel each, whose output is returned to two char devices. Intended for demonstration and testing. Signed-off-by:
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Alessandro Rubini authored
This is either one-shot or periodic. For output it uses the timestamp structure in the control block, for input it doesn't yet. Output may have some buglets; I'll fix when zio-loop is in place for diagnostics. Signed-off-by:
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