- Mar 25, 2013
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Federico Vaga authored
The 'version' attribute is a standard attribute. It is placed at the last position of the standard attribute array. In this way, it is easier to identify it in an hexdump stream because it is the last standard attribute. At the moment the last index of standard attributes array is 15, but in a far away future may change. The aim of this attribute is to identify the version of an attribute set of a ZIO object (device, trigger, buffer). During development the set of attribute exported by a driver may change. This attribute must be used to notify these changes to user-space programs. The attribute is optional. When used in a device, we suggest to place it at device level. Signed-off-by:
Federico Vaga <federico.vaga@gmail.com> Acked-by:
Alessandro Rubini <rubini@gnudd.com>
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- Mar 08, 2013
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Federico Vaga authored
This change also the meaning of the attribute. It is not the number of re-enable after the first arm/fire. It is the absolute number of shots that the trigger must do. Signed-off-by:
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Federico Vaga authored
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Federico Vaga authored
Fix memory lost in an error condition Signed-off-by:
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- Jan 25, 2013
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Alessandro Rubini authored
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During creation, ti_create_and_init accept cset as parameter. So the trigger can use this operation in some way. So, we cannot set to null ti_old->cset because the trigger can use it again Signed-off-by:
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- Jan 21, 2013
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Alessandro Rubini authored
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Alessandro Rubini authored
Since the trigger often runs at interrupt time, we need the irqsave/irqrestore spinlock in the critical sections of buffers. Signed-off-by:
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Warning introduced by 0994f8c7 trigger-user: arm on push only of all channels are ready Signed-off-by: -
Alessandro Rubini authored
Some of the information in there was old, and we should rather extract the files in Documentaion/zio/ from the doc/zio-manual.txt . Currently, just remove the old information. Please, users, read material in doc/ instead (or the pdf on ohwr.org). Signed-off-by:
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Alessandro Rubini authored
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Alessandro Rubini authored
Now that all buffers cannot fail at store_block() time, the file operations can be simplified. This also fixes some misbehaviour in corner cases. Signed-off-by:
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Alessandro Rubini authored
This is a fix for a design bug for this buffer. Actually, the vmalloc buffer already is like this (and cannot be different). This allows simplifying chardev.c and fix some corner cases that are currently misbehaving. Signed-off-by:
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Federico Vaga authored
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Alessandro Rubini authored
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Alessandro Rubini authored
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Alessandro Rubini authored
Also, avoid dereferencing a NULL pointer in raw_io(). Signed-off-by:
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Alessandro Rubini authored
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Alessandro Rubini authored
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Alessandro Rubini authored
This also reorganizes generic_data_done to exploit symmetry between input and output csets. Actually, we didn't update seq_num or the timestamp for output, but now we have the current control in sysfs, so we'd better update it every time. Signed-off-by:
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Alessandro Rubini authored
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Alessandro Rubini authored
Soft timestamping happens at zio_arm_trigger time. This removes the various software timestamping in the individual trigger. Moreover, arming is idempotent, so timestamp in the locked section, only when the trigger is actually armed. As usual, hardware can overwrite ti timestamps, so this software stamp is only used for devices that have no better notion of time. Signed-off-by:
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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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Federico Vaga authored
This help user-space programs which use libudev to rebuild the ZIO device structure Signed-off-by:
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Federico Vaga authored
This has no effect for ZIO users Signed-off-by:
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Federico Vaga authored
address is a default ZIO binary attribute which return the channel address structure zio_addr. Signed-off-by:
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Federico Vaga authored
Alarms are raised by some events and are persistent (in sysfs and in the control blocks) until they are cleared in sysfs. Clearing is write-1-to-clear (i.e.: write 32 to clear bit 5). Signed-off-by:
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Federico Vaga authored
The Linux kernel automatic updates the uevent attributes only if the device has a bus or a class. When the Linux kernel updates the uevent it automatically adds the DEVTYPE attribute if the device has a device_type. In ZIO cset, channel, buffer and trigger have not a bus or a class, but they have a different device_type. These attributes are used to export the device_type to user-space and allow libudev to easy inspect the ZIO device hierarchy. Signed-off-by:
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This has no effect on ZIO users, but tries to make some order in the file itself giving symbolic name to attribute groups. Signed-off-by:
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The devname attribute returns the device name in /dev to gain access to blocks. Signed-off-by:
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This is not really useful for the ZIO framework, but it simplify the work on the user-space side with the libudev library Signed-off-by:
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This fixes a deadlock when changing of trigger type at runtime. bug introduced in a496ca04 Signed-off-by:
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- Jan 19, 2013
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Alessandro Rubini authored
Since __zio_write_allowed and __zio_read_allowed don't check the type of cset (input or output), it must be checked by the called, like read and write do. Otherwise, users of poll() on input channels will loose one every other block, because now __zio_write_allowed can free user blocks. Bug exposed by commit: efbcb48a chardev.c: support zero-sized blocks on output Signed-off-by:
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- Jan 18, 2013
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This patch renames ZIO_CONTROL_SIZE to __ZIO_CONTROL_SIZE and it introduces the function zio_control_size(chan). At a future time, the function will return a channel-dependent value, when we implement TLV to extend the control structure. Signed-off-by:
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This patch introduces ZIO_RW_PERM and ZIO_RO_PERM, which are used in all attributes. Prevoously we had write-all for writeable attributes, now we only allos the owner and the group. Signed-off-by:
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