To support XRC, we add a new protection object, an XRC domain. XRC domains are used to associate XRC target QPs and SRQs. A device indicates that they support XRC through a capability bit.
This patch is derived from work by Jack Morgenstein <[email protected]> Signed-off-by: Sean Hefty <[email protected]> --- drivers/infiniband/core/verbs.c | 26 ++++++++++++++++++++++++++ include/rdma/ib_verbs.h | 22 ++++++++++++++++++++++ 2 files changed, 48 insertions(+), 0 deletions(-) diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index af7a8b0..5e03ab7 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -920,3 +920,29 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) return qp->device->detach_mcast(qp, gid, lid); } EXPORT_SYMBOL(ib_detach_mcast); + +struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device) +{ + struct ib_xrcd *xrcd; + + if (!device->alloc_xrcd) + return ERR_PTR(-ENOSYS); + + xrcd = device->alloc_xrcd(device, NULL, NULL); + if (!IS_ERR(xrcd)) { + xrcd->device = device; + atomic_set(&xrcd->usecnt, 0); + } + + return xrcd; +} +EXPORT_SYMBOL(ib_alloc_xrcd); + +int ib_dealloc_xrcd(struct ib_xrcd *xrcd) +{ + if (atomic_read(&xrcd->usecnt)) + return -EBUSY; + + return xrcd->device->dealloc_xrcd(xrcd); +} +EXPORT_SYMBOL(ib_dealloc_xrcd); diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 55cd0a0..760662f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -112,6 +112,7 @@ enum ib_device_cap_flags { */ IB_DEVICE_UD_IP_CSUM = (1<<18), IB_DEVICE_UD_TSO = (1<<19), + IB_DEVICE_XRC = (1<<20), IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21), IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22), }; @@ -857,6 +858,11 @@ struct ib_pd { atomic_t usecnt; /* count all resources */ }; +struct ib_xrcd { + struct ib_device *device; + atomic_t usecnt; /* count all resources */ +}; + struct ib_ah { struct ib_device *device; struct ib_pd *pd; @@ -1148,6 +1154,10 @@ struct ib_device { struct ib_grh *in_grh, struct ib_mad *in_mad, struct ib_mad *out_mad); + struct ib_xrcd * (*alloc_xrcd)(struct ib_device *device, + struct ib_ucontext *ucontext, + struct ib_udata *udata); + int (*dealloc_xrcd)(struct ib_xrcd *xrcd); struct ib_dma_mapping_ops *dma_ops; @@ -2059,4 +2069,16 @@ int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); */ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid); +/** + * ib_alloc_xrcd - Allocates an XRC domain. + * @device: The device on which to allocate the XRC domain. + */ +struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device); + +/** + * ib_dealloc_xrcd - Deallocates an XRC domain. + * @xrcd: The XRC domain to deallocate. + */ +int ib_dealloc_xrcd(struct ib_xrcd *xrcd); + #endif /* IB_VERBS_H */ -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
