From: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
The only use for the urg interrupt is for priority PSM packets.
There is no reason for this interrupt to be enabled for kernel
contexts.
Reviewed-by: Kaike Wan <kaike.wan@xxxxxxxxx>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
---
drivers/infiniband/hw/hfi1/chip.c | 35 ++++++++++++++++++++++++++++++++---
1 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 1702264..32e35d5 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -12938,6 +12938,32 @@ int hfi1_tempsense_rd(struct hfi1_devdata *dd, struct hfi1_temp *temp)
return ret;
}
+/**
+ * get_int_mask - get 64 bit int mask
+ * @dd - the devdata
+ * @i - the csr (relative to CCE_INT_MASK)
+ *
+ * Returns the mask with the urgent interrupt mask
+ * bit clear for kernel receive contexts.
+ */
+static u64 get_int_mask(struct hfi1_devdata *dd, u32 i)
+{
+ u64 mask = U64_MAX; /* default to no change */
+
+ if (i >= (IS_RCVURGENT_START / 64) && i < (IS_RCVURGENT_END / 64)) {
+ int j = (i - (IS_RCVURGENT_START / 64)) * 64;
+ int k = !j ? IS_RCVURGENT_START % 64 : 0;
+
+ if (j)
+ j -= IS_RCVURGENT_START % 64;
+ /* j = 0..dd->first_dyn_alloc_ctxt - 1,k = 0..63 */
+ for (; j < dd->first_dyn_alloc_ctxt && k < 64; j++, k++)
+ /* convert to bit in mask and clear */
+ mask &= ~BIT_ULL(k);
+ }
+ return mask;
+}
+
/* ========================================================================= */
/*
@@ -12951,9 +12977,12 @@ void set_intr_state(struct hfi1_devdata *dd, u32 enable)
* In HFI, the mask needs to be 1 to allow interrupts.
*/
if (enable) {
- /* enable all interrupts */
- for (i = 0; i < CCE_NUM_INT_CSRS; i++)
- write_csr(dd, CCE_INT_MASK + (8 * i), ~(u64)0);
+ /* enable all interrupts but urgent on kernel contexts */
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++) {
+ u64 mask = get_int_mask(dd, i);
+
+ write_csr(dd, CCE_INT_MASK + (8 * i), mask);
+ }
init_qsfp_int(dd);
} else {
--
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