Commits · 3bbec72a4a850982753c174961fd1bf1b5003705 · Projects / Simple PCIe FMC carrier SPEC

30 Jun, 2020 12 commits
- doc: add information about DMA from debugfs · 3bbec72a
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  3bbec72a
- py: use contextmanager for DMA transfer · a77e93a2
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  a77e93a2
- sw:drv: add debug print to check DMA parameters · 344c890a
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  344c890a
- tst: fix unaligned size test · c4e3a399
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  c4e3a399
- sw:drv: move alignment validation into DMA engine · beb184fc
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  beb184fc
- tst: review transfer tests · 47fef266
  Federico Vaga authored Jun 30, 2020
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Sorry for the bad commit :D
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  47fef266
- sw:drv: unaligned accesses are not supported · aa01b719
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  aa01b719
- tst: dedicated test for invalid sizes · 54242b66
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  54242b66
- sw:drv: remove useless code · f7f92deb
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  f7f92deb
- tst: add test for zero size buffers · 59adb80d
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  59adb80d
- tst: regressions are actually true limitations, remove test · 239dde56
  Federico Vaga authored Jun 30, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  239dde56
- sw:py: dma_write returns the number of transfered bytes · bc0b9676
  Federico Vaga authored Jun 29, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  bc0b9676
29 Jun, 2020 1 commit
- sw:py: add DDR alignment constant · c6b97be4
  Federico Vaga authored Jun 29, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  c6b97be4
26 Jun, 2020 22 commits
- tst: add a DMA write and read-back test · 4aa94f09
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  4aa94f09
- tst: do twice the DMA read and compare · fe1b5c53
  Federico Vaga authored Jun 26, 2020
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We can see if the controller returns random garbage
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  fe1b5c53
- sw:drv: fix NULL pointer bug during ABORT · 83be3241
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  83be3241
- sw:drv: fix copy_to_user arguments order · d7ffed83
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  d7ffed83
- sw:py: enforce bytes() type for DMA data · 60696cb2
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  60696cb2
- sw: add DMA offset support - seek() · 154421e9
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  154421e9
- sw:drv: add DMA write support · 389ee876
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  389ee876
- tst: fix test_dma_read parameters · 00a51e44
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  00a51e44
- sw:drv: enlarge the DMA buffer · c1aa6327
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  c1aa6327
- sw:drv: report DMA errors correctly · 1da1b738
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  1da1b738
- sw:drv: automatically split big DMA requests · 99989903
  Federico Vaga authored Jun 26, 2020
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This is to avoid errors on the HDL side
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  99989903
- sw:drv: DMA direction from function argument · 5e0eaa17
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  5e0eaa17
- sw:drv: remove unused argument · ee611f31
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  ee611f31
- tst: properly release resources after test · 24f1dcee
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  24f1dcee
- sw:py: continue to ask data until 'size' · 8f9e9329
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  8f9e9329
- sw:py: remove unused file after DMA stop · 25f78812
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  25f78812
- sw:py: close DMA file when object is removed for good · 6f76b25a
  Federico Vaga authored Jun 26, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  6f76b25a
- sw:drv: use coherent memory for DMA to simplify code · a32476d7
  Federico Vaga authored Jun 26, 2020
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NOTE: for the time being we are able to do perform maximumx 0x3FFF
Bytes in a single transfer due to HDL limitations
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  a32476d7
- sw:drv: can't allocate the maximum, make it smaller · fa9a17be
  Federico Vaga authored Jun 25, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  fa9a17be
- sw:drv: do not run DMA with 'count = 0' · fd2d09bc
  Federico Vaga authored Jun 25, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  fd2d09bc
- sw:py: disable IO buffering on DMA acquisitions · c38f3bf5
  Federico Vaga authored Jun 25, 2020
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By default ``open()`` configures a buffer. The user will get ``size``
bytes from a buffer within the *io* module. The size used by the *io*
module depends on the buffering configuration.

Here we want full control, so I disable buffering in PySPEC.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  c38f3bf5
- sw:drv: add DMA read interface in debugfs · f8a9221e
  Federico Vaga authored Jun 25, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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  f8a9221e
25 Jun, 2020 5 commits

sw:drv: make use of callback_result to notify errors · 57176098
Federico Vaga authored Jun 25, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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57176098
tst: start pytest effort with basic open/close dma test · 0200a93c
Federico Vaga authored Jun 23, 2020
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Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
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0200a93c

Federico Vaga authored Jun 23, 2020

The module just open and close the DMA file
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

fefdf297

sw:drv: open/close DMA file · e9bff68d

Federico Vaga authored Jun 23, 2020

It opens and close a DMA file. At this moment transfers are still not
possible but we can verify that we can correctly take and release a
DMA channel.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

e9bff68d

sw:drv: add skeleton for DMA over debugfs · 56b52aec

Federico Vaga authored Jun 22, 2020

Just introduce the basic ingredients, the mechanism do not work and
any try to use it will lead to a -ENODEV error
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

56b52aec