diff options
| author | Don Hiatt <don.hiatt@intel.com> | 2017-03-21 03:26:20 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-04-05 21:45:09 +0300 |
| commit | 243d9f436f89f95c304011bd32485afc27581986 (patch) | |
| tree | a0af9e0d577dc57a3d567758e346b9523c6f724c /drivers/infiniband/hw/hfi1/driver.c | |
| parent | 0181ce31b26021f7c2f9506112a05c847a36f0f2 (diff) | |
| download | linux-243d9f436f89f95c304011bd32485afc27581986.tar.xz | |
IB/hfi1: Add transmit fault injection feature
Add ability to fault packets on transmit by opcode.
Dropping by packet can be achieved by setting the mask to 0.
In order to drop non-verbs traffic we set PbcInsertHrc
to NONE (0x2). The packet will still be delivered to
the receiving node but a KHdrHCRCErr (KDETH packet
with a bad HCRC) will be triggered and the packet will
not be delivered to the correct context.
In order to drop regular verbs traffic we set the
PbcTestEbp flag. The packet will still be delivered
to the receiving node but a 'late ebp error' will
be triggered and will be dropped.
A global toggle (/sys/kernel/debug/hfi1/hfi1_X/fault_suppress_err)
has been added to suppress the error messages on the receive
node when a packet was faulted on the sending node.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/driver.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/driver.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c index c0b012f6e11c..64bdbcef5f05 100644 --- a/drivers/infiniband/hw/hfi1/driver.c +++ b/drivers/infiniband/hw/hfi1/driver.c @@ -1367,6 +1367,11 @@ int process_receive_ib(struct hfi1_packet *packet) packet->updegr, rhf_egr_index(packet->rhf)); + if (unlikely( + (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && + (packet->rhf & RHF_DC_ERR)))) + return RHF_RCV_CONTINUE; + if (unlikely(rhf_err_flags(packet->rhf))) { handle_eflags(packet); return RHF_RCV_CONTINUE; @@ -1402,6 +1407,12 @@ int process_receive_bypass(struct hfi1_packet *packet) int process_receive_error(struct hfi1_packet *packet) { + /* KHdrHCRCErr -- KDETH packet with a bad HCRC */ + if (unlikely( + hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && + rhf_rcv_type_err(packet->rhf) == 3)) + return RHF_RCV_CONTINUE; + handle_eflags(packet); if (unlikely(rhf_err_flags(packet->rhf))) |