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annotate rathaxes_samples_e1000_add_a_dma_abstraction.patch @ 111:b072f682823d

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Start a new series to refactor e1000::set_up_device
author Louis Opter <louis@lse.epita.fr>
date Sun, 14 Jul 2013 23:14:33 -0700
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children bfe10def90e3
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111
b072f682823d Start a new series to refactor e1000::set_up_device
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1 # HG changeset patch
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2 # Parent 0f12e80e810de1a9927db1f25dbea49acd73ae3c
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3 e1000: start a DMA allocation/mapping abstraction
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4
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5 It currently matches a lot the Linux DMA API but it should be usable by
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6 other OSes too. The Linux DMA API is described at the end of the chapter
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7 15 in the LDD3.
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8
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9 This will be useful to remove Linux specific DMA code from
b072f682823d Start a new series to refactor e1000::set_up_device
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10 e1000::set_up_device which should be only device independent code.
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11
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12
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13 diff --git a/rathaxes/samples/e1000/dma.rti b/rathaxes/samples/e1000/dma.rti
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14 new file mode 100644
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15 --- /dev/null
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16 +++ b/rathaxes/samples/e1000/dma.rti
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17 @@ -0,0 +1,34 @@
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18 +interface DMA : Builtin, LKM, Device
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19 +{
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20 + provided type AbstractDMAHandle
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21 + {
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22 + chunk LKM::includes();
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23 + decl data_types();
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24 + attribute Builtin::symbol.scalar k_dma_handle;
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25 + }
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26 +
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27 + provided type Direction
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28 + {
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29 + decl data_types();
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30 + }
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31 +
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32 + provided sequence map(Device::AbstractDevice, Builtin::symbol, Builtin::number, Direction)
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33 + {
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34 + provided chunk ::CALL(); /* -> AbstractDMAHandle */
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35 + }
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36 +
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37 + provided sequence unmap(Device::AbstractDevice, AbstractDMAHandle, Builtin::number, Direction)
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38 + {
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39 + provided chunk ::CALL();
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40 + }
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41 +
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42 + provided sequence alloc_coherent(Device::AbstractDevice, Builtin::number, Builtin::symbol)
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43 + {
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44 + provided chunk ::CALL(); /* -> AbstractDMAHandle + addr returned via the symbol */
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45 + }
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46 +
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47 + provided sequence free_coherent(Device::AbstractDevice, Builtin::number, Builtin::symbol, AbstractDMAHandle)
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48 + {
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49 + provided chunk ::CALL();
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50 + }
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51 +}