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net: ipa: explicitly disallow inter-EE interrupts 

It is possible for other execution environments (EEs, like the modem)
to request changes to local (AP) channel or event ring state.  We do
not support this feature.

In gsi_irq_setup(), explicitly zero the mask that defines which
channels are permitted to generate inter-EE channel state change
interrupts.  Do the same for the event ring mask.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alex Elder 2020-11-05 12:14:05 -06:00 committed by Jakub Kicinski
parent 06c8632833
commit 46f748ccaf
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ipa/gsi.c
View File

@ -259,6 +259,8 @@ static void gsi_irq_setup(struct gsi *gsi)
iowrite32(0, gsi->virt + GSI_CNTXT_SRC_EV_CH_IRQ_MSK_OFFSET);
iowrite32(0, gsi->virt + GSI_CNTXT_GLOB_IRQ_EN_OFFSET);
iowrite32(0, gsi->virt + GSI_CNTXT_SRC_IEOB_IRQ_MSK_OFFSET);
iowrite32(0, gsi->virt + GSI_INTER_EE_SRC_CH_IRQ_OFFSET);
iowrite32(0, gsi->virt + GSI_INTER_EE_SRC_EV_CH_IRQ_OFFSET);
}
/* Turn off all GSI interrupts when we're all done */
@ -307,8 +309,6 @@ static void gsi_irq_enable(struct gsi *gsi)
iowrite32(ERROR_INT_FMASK, gsi->virt + GSI_CNTXT_GLOB_IRQ_EN_OFFSET);
gsi->type_enabled_bitmap |= BIT(GSI_GLOB_EE);
/* We don't use inter-EE channel or event interrupts */
/* Never enable GSI_BREAK_POINT */
val = GSI_CNTXT_GSI_IRQ_ALL & ~BREAK_POINT_FMASK;
iowrite32(val, gsi->virt + GSI_CNTXT_GSI_IRQ_EN_OFFSET);