remoteproc: allocate vrings on demand, free when not needed

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Dynamically allocate the vrings' DMA when the remote processor
is about to be powered on (i.e. when ->find_vqs() is invoked),
and release them as soon as it is powered off (i.e. when ->del_vqs()
is invoked).

The obvious and immediate benefit is better memory utilization, since
memory for the vrings is now only allocated when the relevant remote
processor is used.

Additionally, this approach also makes recovery of a (crashing)
remote processor easier: one just needs to remove the relevant
vdevs, and the entire vrings cleanup takes place automagically.

Tested-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>

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This commit is contained in:

Ohad Ben-Cohen 2012-05-17 14:23:59 +03:00

parent 485802a6c5

commit 6db20ea8d8

3 changed files with 67 additions and 57 deletions

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137

drivers/remoteproc/remoteproc_core.c

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2

drivers/remoteproc/remoteproc_internal.h

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13

drivers/remoteproc/remoteproc_virtio.c

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