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| author | Kaike Wan <kaike.wan@intel.com> | 2019-02-05 14:13:13 -0800 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-02-05 17:53:54 -0500 |
| commit | 37356e78328186814e994e0ad1a1cfd6a142bef4 (patch) | |
| tree | 9b956363e2c08ab89ee62e0d013113b6e05c483d /drivers/infiniband/hw/hfi1/common.h | |
| parent | 385156c5f2a61834666f079ee66338f177c65c28 (diff) | |
| download | linux-37356e78328186814e994e0ad1a1cfd6a142bef4.tar.bz2 | |
IB/hfi1: TID RDMA flow allocation
The hfi1 hardware flow is a hardware flow-control mechanism for a KDETH
data packet that is received on a hfi1 port. It validates the packet by
checking both the generation and sequence. Each QP that uses the TID RDMA
mechanism will allocate a hardware flow from its receiving context for
any incoming KDETH data packets.
This patch implements:
(1) a function to allocate hardware flow
(2) a function to free hardware flow
(3) a function to initialize hardware flow generation for a receiving
context
(4) a wait mechanism if the hardware flow is not available
(4) a function to remove the qp from the wait queue for hardware flow
when the qp is reset or destroyed.
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@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/common.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/common.h b/drivers/infiniband/hw/hfi1/common.h index 40d3cfb58bd1..7310a5dba420 100644 --- a/drivers/infiniband/hw/hfi1/common.h +++ b/drivers/infiniband/hw/hfi1/common.h @@ -340,6 +340,10 @@ struct diag_pkt { #define HFI1_PSM_IOC_BASE_SEQ 0x0 +/* Number of BTH.PSN bits used for sequence number in expected rcvs */ +#define HFI1_KDETH_BTH_SEQ_SHIFT 11 +#define HFI1_KDETH_BTH_SEQ_MASK (BIT(HFI1_KDETH_BTH_SEQ_SHIFT) - 1) + static inline __u64 rhf_to_cpu(const __le32 *rbuf) { return __le64_to_cpu(*((__le64 *)rbuf)); |