lkml.org 
[lkml]   [2020]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH net-next 11/13] net: ipa: explicitly disallow inter-EE interrupts
Date
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>
---
drivers/net/ipa/gsi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index aae8ea852349d..5e10e5c1713b1 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -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);
--
2.20.1
\
 
 \ /
  Last update: 2020-11-05 19:15    [W:0.214 / U:0.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site