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IB/rdmavt: Add data structures and routines for table driven post send

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Add flexibility for driver dependent operations in post send
because different drivers will have differing post send
operation support.

This includes data structure definitions to support a table
driven scheme along with the necessary validation routine
using the new table.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Jianxin Xiong <jianxin.xiong@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@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 2016-07-01 16:02:07 -07:00 committed by Doug Ledford
parent 71e68e3db8
commit afcf8f7647
3 changed files with 89 additions and 9 deletions
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67
drivers/infiniband/sw/rdmavt/qp.c
View file

@ -613,6 +613,7 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
struct rvt_dev_info *rdi = ib_to_rvt(ibpd->device);
void *priv = NULL;
gfp_t gfp;
size_t sqsize;
if (!rdi)
return ERR_PTR(-EINVAL);
@ -643,7 +644,8 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
init_attr->cap.max_recv_wr == 0)
return ERR_PTR(-EINVAL);
}
sqsize =
init_attr->cap.max_send_wr + 1;
switch (init_attr->qp_type) {
case IB_QPT_SMI:
case IB_QPT_GSI:
@ -658,11 +660,11 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
sizeof(struct rvt_swqe);
if (gfp == GFP_NOIO)
swq = __vmalloc(
(init_attr->cap.max_send_wr + 1) * sz,
sqsize * sz,
gfp | __GFP_ZERO, PAGE_KERNEL);
else
swq = vzalloc_node(
(init_attr->cap.max_send_wr + 1) * sz,
sqsize * sz,
rdi->dparms.node);
if (!swq)
return ERR_PTR(-ENOMEM);
@ -747,7 +749,7 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
INIT_LIST_HEAD(&qp->rspwait);
qp->state = IB_QPS_RESET;
qp->s_wq = swq;
qp->s_size = init_attr->cap.max_send_wr + 1;
qp->s_size = sqsize;
qp->s_avail = init_attr->cap.max_send_wr;
qp->s_max_sge = init_attr->cap.max_send_sge;
if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR)
@ -1440,12 +1442,65 @@ int rvt_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
}
/**
* qp_get_savail - return number of avail send entries
* rvt_qp_valid_operation - validate post send wr request
* @qp - the qp
* @post-parms - the post send table for the driver
* @wr - the work request
*
* The routine validates the operation based on the
* validation table an returns the length of the operation
* which can extend beyond the ib_send_bw. Operation
* dependent flags key atomic operation validation.
*
* There is an exception for UD qps that validates the pd and
* overrides the length to include the additional UD specific
* length.
*
* Returns a negative error or the length of the work request
* for building the swqe.
*/
static inline int rvt_qp_valid_operation(
struct rvt_qp *qp,
const struct rvt_operation_params *post_parms,
struct ib_send_wr *wr)
{
int len;
if (wr->opcode >= RVT_OPERATION_MAX || !post_parms[wr->opcode].length)
return -EINVAL;
if (!(post_parms[wr->opcode].qpt_support & BIT(qp->ibqp.qp_type)))
return -EINVAL;
if ((post_parms[wr->opcode].flags & RVT_OPERATION_PRIV) &&
ibpd_to_rvtpd(qp->ibqp.pd)->user)
return -EINVAL;
if (post_parms[wr->opcode].flags & RVT_OPERATION_ATOMIC_SGE &&
(wr->num_sge == 0 ||
wr->sg_list[0].length < sizeof(u64) ||
wr->sg_list[0].addr & (sizeof(u64) - 1)))
return -EINVAL;
if (post_parms[wr->opcode].flags & RVT_OPERATION_ATOMIC &&
!qp->s_max_rd_atomic)
return -EINVAL;
len = post_parms[wr->opcode].length;
/* UD specific */
if (qp->ibqp.qp_type != IB_QPT_UC &&
qp->ibqp.qp_type != IB_QPT_RC) {
if (qp->ibqp.pd != ud_wr(wr)->ah->pd)
return -EINVAL;
len = sizeof(struct ib_ud_wr);
}
return len;
}
/**
* qp_get_savail - return number of avail send entries
* @qp - the qp
*
* This assumes the s_hlock is held but the s_last
* qp variable is uncontrolled.
*
* The return is adjusted to not count device specific
* reserved operations.
*/
static inline u32 qp_get_savail(struct rvt_qp *qp)
{
@ -1481,6 +1536,8 @@ static int rvt_post_one_wr(struct rvt_qp *qp,
u8 log_pmtu;
int ret;
BUILD_BUG_ON(IB_QPT_MAX >= (sizeof(u32) * BITS_PER_BYTE));
/* IB spec says that num_sge == 0 is OK. */
if (unlikely(wr->num_sge > qp->s_max_sge))
return -EINVAL;

3
include/rdma/rdma_vt.h
View file

@ -351,6 +351,9 @@ struct rvt_dev_info {
/* Driver specific properties */
struct rvt_driver_params dparms;
/* post send table */
const struct rvt_operation_params *post_parms;
struct rvt_mregion __rcu *dma_mr;
struct rvt_lkey_table lkey_table;

28
include/rdma/rdmavt_qp.h
View file

@ -228,11 +228,31 @@ struct rvt_ack_entry {
#define RC_QP_SCALING_INTERVAL 5
/*
* Variables prefixed with s_ are for the requester (sender).
* Variables prefixed with r_ are for the responder (receiver).
* Variables prefixed with ack_ are for responder replies.
#define RVT_OPERATION_PRIV 0x00000001
#define RVT_OPERATION_ATOMIC 0x00000002
#define RVT_OPERATION_ATOMIC_SGE 0x00000004
#define RVT_OPERATION_MAX (IB_WR_RESERVED10 + 1)
/**
* rvt_operation_params - op table entry
* @length - the length to copy into the swqe entry
* @qpt_support - a bit mask indicating QP type support
* @flags - RVT_OPERATION flags (see above)
*
* This supports table driven post send so that
* the driver can have differing an potentially
* different sets of operations.
*
**/
struct rvt_operation_params {
size_t length;
u32 qpt_support;
u32 flags;
};
/*
* Common variables are protected by both r_rq.lock and s_lock in that order
* which only happens in modify_qp() or changing the QP 'state'.
*/