diff options
| 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/hfi.h | |
| parent | 385156c5f2a61834666f079ee66338f177c65c28 (diff) | |
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/hfi.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/hfi.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h index 9aa0357e17b7..78aa344c7403 100644 --- a/drivers/infiniband/hw/hfi1/hfi.h +++ b/drivers/infiniband/hw/hfi1/hfi.h @@ -198,6 +198,14 @@ struct exp_tid_set { }; typedef int (*rhf_rcv_function_ptr)(struct hfi1_packet *packet); + +struct tid_queue { + struct list_head queue_head; + /* queue head for QP TID resource waiters */ + u32 enqueue; /* count of tid enqueues */ + u32 dequeue; /* count of tid dequeues */ +}; + struct hfi1_ctxtdata { /* rcvhdrq base, needs mmap before useful */ void *rcvhdrq; @@ -291,6 +299,10 @@ struct hfi1_ctxtdata { /* PSM Specific fields */ /* lock protecting all Expected TID data */ struct mutex exp_mutex; + /* lock protecting all Expected TID data of kernel contexts */ + spinlock_t exp_lock; + /* Queue for QP's waiting for HW TID flows */ + struct tid_queue flow_queue; /* when waiting for rcv or pioavail */ wait_queue_head_t wait; /* uuid from PSM */ @@ -323,6 +335,9 @@ struct hfi1_ctxtdata { */ u8 subctxt_cnt; + /* Bit mask to track free TID RDMA HW flows */ + unsigned long flow_mask; + struct tid_flow_state flows[RXE_NUM_TID_FLOWS]; }; /** |