@@ -261,6 +261,7 @@ static void gsi_irq_setup(struct gsi *gsi)
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);
+ iowrite32(0, gsi->virt + GSI_CNTXT_GSI_IRQ_EN_OFFSET);
}
/* Turn off all GSI interrupts when we're all done */
@@ -309,8 +310,14 @@ 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);
- /* Never enable GSI_BREAK_POINT */
- val = GSI_CNTXT_GSI_IRQ_ALL & ~BREAK_POINT_FMASK;
+ /* General GSI interrupts are reported to all EEs; if they occur
+ * they are unrecoverable (without reset). A breakpoint interrupt
+ * also exists, but we don't support that. We want to be notified
+ * of errors so we can report them, even if they can't be handled.
+ */
+ val = BUS_ERROR_FMASK;
+ val |= CMD_FIFO_OVRFLOW_FMASK;
+ val |= MCS_STACK_OVRFLOW_FMASK;
iowrite32(val, gsi->virt + GSI_CNTXT_GSI_IRQ_EN_OFFSET);
gsi->type_enabled_bitmap |= BIT(GSI_GENERAL);
@@ -1186,8 +1193,7 @@ static void gsi_isr_general(struct gsi *gsi)
val = ioread32(gsi->virt + GSI_CNTXT_GSI_IRQ_STTS_OFFSET);
iowrite32(val, gsi->virt + GSI_CNTXT_GSI_IRQ_CLR_OFFSET);
- if (val)
- dev_err(dev, "unexpected general interrupt 0x%08x\n", val);
+ dev_err(dev, "unexpected general interrupt 0x%08x\n", val);
}
/**
@@ -353,7 +353,6 @@ enum gsi_irq_type_id {
#define BUS_ERROR_FMASK GENMASK(1, 1)
#define CMD_FIFO_OVRFLOW_FMASK GENMASK(2, 2)
#define MCS_STACK_OVRFLOW_FMASK GENMASK(3, 3)
-#define GSI_CNTXT_GSI_IRQ_ALL GENMASK(3, 0)
#define GSI_CNTXT_INTSET_OFFSET \
GSI_EE_N_CNTXT_INTSET_OFFSET(GSI_EE_AP)
Most GSI general errors are unrecoverable without a full reset. Despite that, we want to receive these errors so we can at least report what happened before whatever undefined behavior ensues. Explicitly disable all such interrupts in gsi_irq_setup(), then enable those we want in gsi_irq_enable(). List the interrupt types we are interested in (everything but breakpoint) explicitly rather than using GSI_CNTXT_GSI_IRQ_ALL, and remove that symbol's definition. Signed-off-by: Alex Elder <elder@linaro.org> --- drivers/net/ipa/gsi.c | 14 ++++++++++---- drivers/net/ipa/gsi_reg.h | 1 - 2 files changed, 10 insertions(+), 5 deletions(-)