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| H A D | Device.py | diff 13930:c5e728ccd2e2 Sun Jan 27 19:37:00 EST 2019 Giacomo Travaglini <giacomo.travaglini@arm.com> dev: StreamID generation in DMA device This patch is adding a StreamID tag to any DMA Packet. StreamIDs are tags which are used by IOMMUs to distinguish between different devices/functions. For PCI devices for example, the RID (Pci Bus number, Pci Device number, Pci Function number) could be stored in the Packet streamID field. For the DmaDevice base class, a simple pair of (Sub)StreamIDs has been provided. This is basically attaching a fixed (decided at python config time) streamID per device. If a derived device wants to implement a more elaborate packet tagger (for example if it wants to have more than one streamID), it needs to pass a different StreamID and SubstreamID to the DmaPort interface (like dmaAction). Change-Id: Ia17cf00437f7d3eb79211c1374134b174f90de59 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/16749 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Tested-by: kokoro <noreply+kokoro@google.com> |
| H A D | dma_device.hh | diff 13930:c5e728ccd2e2 Sun Jan 27 19:37:00 EST 2019 Giacomo Travaglini <giacomo.travaglini@arm.com> dev: StreamID generation in DMA device This patch is adding a StreamID tag to any DMA Packet. StreamIDs are tags which are used by IOMMUs to distinguish between different devices/functions. For PCI devices for example, the RID (Pci Bus number, Pci Device number, Pci Function number) could be stored in the Packet streamID field. For the DmaDevice base class, a simple pair of (Sub)StreamIDs has been provided. This is basically attaching a fixed (decided at python config time) streamID per device. If a derived device wants to implement a more elaborate packet tagger (for example if it wants to have more than one streamID), it needs to pass a different StreamID and SubstreamID to the DmaPort interface (like dmaAction). Change-Id: Ia17cf00437f7d3eb79211c1374134b174f90de59 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/16749 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Tested-by: kokoro <noreply+kokoro@google.com> |
| H A D | dma_device.cc | diff 13930:c5e728ccd2e2 Sun Jan 27 19:37:00 EST 2019 Giacomo Travaglini <giacomo.travaglini@arm.com> dev: StreamID generation in DMA device This patch is adding a StreamID tag to any DMA Packet. StreamIDs are tags which are used by IOMMUs to distinguish between different devices/functions. For PCI devices for example, the RID (Pci Bus number, Pci Device number, Pci Function number) could be stored in the Packet streamID field. For the DmaDevice base class, a simple pair of (Sub)StreamIDs has been provided. This is basically attaching a fixed (decided at python config time) streamID per device. If a derived device wants to implement a more elaborate packet tagger (for example if it wants to have more than one streamID), it needs to pass a different StreamID and SubstreamID to the DmaPort interface (like dmaAction). Change-Id: Ia17cf00437f7d3eb79211c1374134b174f90de59 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/16749 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Tested-by: kokoro <noreply+kokoro@google.com> |
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