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IB/hfi1: Insure int mask for in-kernel receive contexts is clear

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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@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mike Marciniszyn 2017-10-23 06:06:16 -07:00 committed by Doug Ledford
parent 1b311f8931
commit 2d9544aacf
1 changed files with 32 additions and 3 deletions
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35
drivers/infiniband/hw/hfi1/chip.c
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@ -12935,6 +12935,32 @@ 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;
}
/* ========================================================================= */
/*
@ -12948,9 +12974,12 @@ 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 {