From mboxrd@z Thu Jan 1 00:00:00 1970 From: sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org Subject: [PATCH v4 3/7] livibverbs: Add support for XRC SRQs Date: Fri, 15 Mar 2013 17:38:42 -0700 Message-ID: <1363394326-908-3-git-send-email-sean.hefty@intel.com> References: <1828884A29C6694DAF28B7E6B8A8237346A981A0@FMSMSX151.amr.corp.intel.com> Return-path: In-Reply-To: <1828884A29C6694DAF28B7E6B8A8237346A981A0-Q3cL8pyY+6ukrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, roland-BHEL68pLQRGGvPXPguhicg@public.gmane.org Cc: Sean Hefty List-Id: linux-rdma@vger.kernel.org From: Sean Hefty XRC support requires the use of a new type of SRQ. XRC shared receive queues: xrc srq's are similar to normal srq's, except that they are bound to an xrcd, rather than to a protection domain. Based on the current spec and implementation, they are only usable with xrc qps. To support xrc srq's, we define a new srq_init_attr structure to include an srq type and other needed information. The kernel ABI is also updated to allow creating extended SRQs. Signed-off-by: Sean Hefty --- include/infiniband/driver.h | 27 ++++++++++++++++ include/infiniband/kern-abi.h | 21 ++++++++++++- include/infiniband/verbs.h | 61 +++++++++++++++++++++++++++++++++++- src/cmd.c | 69 +++++++++++++++++++++++++++++++++++++++++ src/libibverbs.map | 1 + 5 files changed, 177 insertions(+), 2 deletions(-) diff --git a/include/infiniband/driver.h b/include/infiniband/driver.h index ce88442..05ff730 100644 --- a/include/infiniband/driver.h +++ b/include/infiniband/driver.h @@ -64,6 +64,23 @@ struct verbs_xrcd { uint32_t handle; }; +enum verbs_srq_mask { + VERBS_SRQ_TYPE = 1 << 0, + VERBS_SRQ_XRCD = 1 << 1, + VERBS_SRQ_CQ = 1 << 2, + VERBS_SRQ_NUM = 1 << 3, + VERBS_SRQ_RESERVED = 1 << 4 +}; + +struct verbs_srq { + struct ibv_srq srq; + uint32_t comp_mask; + enum ibv_srq_type srq_type; + struct verbs_xrcd *xrcd; + struct ibv_cq *cq; + uint32_t srq_num; +}; + typedef struct ibv_device *(*ibv_driver_init_func)(const char *uverbs_sys_path, int abi_version); typedef struct verbs_device *(*verbs_driver_init_func)(const char *uverbs_sys_path, @@ -118,6 +135,10 @@ int ibv_cmd_create_srq(struct ibv_pd *pd, struct ibv_srq *srq, struct ibv_srq_init_attr *attr, struct ibv_create_srq *cmd, size_t cmd_size, struct ibv_create_srq_resp *resp, size_t resp_size); +int ibv_cmd_create_srq_ex(struct ibv_context *context, + struct verbs_srq *srq, struct ibv_srq_init_attr_ex *attr_ex, + struct ibv_create_xsrq *cmd, size_t cmd_size, + struct ibv_create_srq_resp *resp, size_t resp_size); int ibv_cmd_modify_srq(struct ibv_srq *srq, struct ibv_srq_attr *srq_attr, int srq_attr_mask, @@ -162,4 +183,10 @@ const char *ibv_get_sysfs_path(void); int ibv_read_sysfs_file(const char *dir, const char *file, char *buf, size_t size); +static inline uint32_t verbs_get_srq_num(struct ibv_srq *srq) +{ + struct verbs_srq *vsrq = container_of(srq, struct verbs_srq, srq); + return (vsrq->comp_mask & VERBS_SRQ_NUM) ? vsrq->srq_num : 0; +} + #endif /* INFINIBAND_DRIVER_H */ diff --git a/include/infiniband/kern-abi.h b/include/infiniband/kern-abi.h index d7c673f..3d72fa7 100644 --- a/include/infiniband/kern-abi.h +++ b/include/infiniband/kern-abi.h @@ -88,6 +88,7 @@ enum { IB_USER_VERBS_CMD_POST_SRQ_RECV, IB_USER_VERBS_CMD_OPEN_XRCD, IB_USER_VERBS_CMD_CLOSE_XRCD, + IB_USER_VERBS_CMD_CREATE_XSRQ }; /* @@ -730,11 +731,28 @@ struct ibv_create_srq { __u64 driver_data[0]; }; +struct ibv_create_xsrq { + __u32 command; + __u16 in_words; + __u16 out_words; + __u64 response; + __u64 user_handle; + __u32 srq_type; + __u32 pd_handle; + __u32 max_wr; + __u32 max_sge; + __u32 srq_limit; + __u32 reserved; + __u32 xrcd_handle; + __u32 cq_handle; + __u64 driver_data[0]; +}; + struct ibv_create_srq_resp { __u32 srq_handle; __u32 max_wr; __u32 max_sge; - __u32 reserved; + __u32 srqn; }; struct ibv_modify_srq { @@ -829,6 +847,7 @@ enum { IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL_V2 = -1, IB_USER_VERBS_CMD_OPEN_XRCD_V2 = -1, IB_USER_VERBS_CMD_CLOSE_XRCD_V2 = -1, + IB_USER_VERBS_CMD_CREATE_XSRQ_V2 = -1 }; struct ibv_destroy_cq_v1 { diff --git a/include/infiniband/verbs.h b/include/infiniband/verbs.h index cf8299a..d7dfcd3 100644 --- a/include/infiniband/verbs.h +++ b/include/infiniband/verbs.h @@ -427,6 +427,30 @@ struct ibv_srq_init_attr { struct ibv_srq_attr attr; }; +enum ibv_srq_type { + IBV_SRQT_BASIC, + IBV_SRQT_XRC +}; + +enum ibv_srq_init_attr_mask { + IBV_SRQ_INIT_ATTR_TYPE = 1 << 0, + IBV_SRQ_INIT_ATTR_PD = 1 << 1, + IBV_SRQ_INIT_ATTR_XRCD = 1 << 2, + IBV_SRQ_INIT_ATTR_CQ = 1 << 3, + IBV_SRQ_INIT_ATTR_RESERVED = 1 << 4 +}; + +struct ibv_srq_init_attr_ex { + void *srq_context; + struct ibv_srq_attr attr; + + uint32_t comp_mask; + enum ibv_srq_type srq_type; + struct ibv_pd *pd; + struct ibv_xrcd *xrcd; + struct ibv_cq *cq; +}; + enum ibv_qp_type { IBV_QPT_RC = 2, IBV_QPT_UC, @@ -746,11 +770,15 @@ struct ibv_context { enum verbs_context_mask { VERBS_CONTEXT_XRCD = 1 << 0, - VERBS_CONTEXT_RESERVED = 1 << 1 + VERBS_CONTEXT_SRQ = 1 << 1, + VERBS_CONTEXT_RESERVED = 1 << 2 }; struct verbs_context { /* "grows up" - new fields go here */ + uint32_t (*get_srq_num)(struct ibv_srq *srq); + struct ibv_srq * (*create_srq_ex)(struct ibv_context *context, + struct ibv_srq_init_attr_ex *srq_init_attr_ex); struct ibv_xrcd * (*open_xrcd)(struct ibv_context *context, struct ibv_xrcd_init_attr *xrcd_init_attr); int (*close_xrcd)(struct ibv_xrcd *xrcd); @@ -1034,6 +1062,27 @@ static inline int ibv_req_notify_cq(struct ibv_cq *cq, int solicited_only) struct ibv_srq *ibv_create_srq(struct ibv_pd *pd, struct ibv_srq_init_attr *srq_init_attr); +static inline struct ibv_srq * +ibv_create_srq_ex(struct ibv_context *context, + struct ibv_srq_init_attr_ex *srq_init_attr_ex) +{ + struct verbs_context *vctx; + uint32_t mask = srq_init_attr_ex->comp_mask; + + if (!(mask & ~(IBV_SRQ_INIT_ATTR_PD | IBV_SRQ_INIT_ATTR_TYPE)) && + (mask & IBV_SRQ_INIT_ATTR_PD) && + (!(mask & IBV_SRQ_INIT_ATTR_TYPE) || + (srq_init_attr_ex->srq_type == IBV_SRQT_BASIC))) + return ibv_create_srq(srq_init_attr_ex->pd, + (struct ibv_srq_init_attr *) srq_init_attr_ex); + + if (!(vctx = verbs_get_ctx_op(context, create_srq_ex))) { + errno = ENOSYS; + return NULL; + } + return vctx->create_srq_ex(context, srq_init_attr_ex); +} + /** * ibv_modify_srq - Modifies the attributes for the specified SRQ. * @srq: The SRQ to modify. @@ -1058,6 +1107,16 @@ int ibv_modify_srq(struct ibv_srq *srq, */ int ibv_query_srq(struct ibv_srq *srq, struct ibv_srq_attr *srq_attr); +static inline uint32_t ibv_get_srq_num(struct ibv_srq *srq) +{ + struct verbs_context *vctx = verbs_get_ctx_op(srq->context, get_srq_num); + if (!vctx) { + errno = ENOSYS; + return 0; + } + return vctx->get_srq_num(srq); +} + /** * ibv_destroy_srq - Destroys the specified SRQ. * @srq: The SRQ to destroy. diff --git a/src/cmd.c b/src/cmd.c index f0fb1dc..641ab28 100644 --- a/src/cmd.c +++ b/src/cmd.c @@ -488,6 +488,75 @@ int ibv_cmd_create_srq(struct ibv_pd *pd, return 0; } +int ibv_cmd_create_srq_ex(struct ibv_context *context, + struct verbs_srq *srq, struct ibv_srq_init_attr_ex *attr_ex, + struct ibv_create_xsrq *cmd, size_t cmd_size, + struct ibv_create_srq_resp *resp, size_t resp_size) +{ + struct verbs_xrcd *vxrcd = NULL; + + IBV_INIT_CMD_RESP(cmd, cmd_size, CREATE_XSRQ, resp, resp_size); + + if (attr_ex->comp_mask >= IBV_SRQ_INIT_ATTR_RESERVED) + return ENOSYS; + + if (!(attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_PD)) + return EINVAL; + + cmd->user_handle = (uintptr_t) srq; + cmd->pd_handle = attr_ex->pd->handle; + cmd->max_wr = attr_ex->attr.max_wr; + cmd->max_sge = attr_ex->attr.max_sge; + cmd->srq_limit = attr_ex->attr.srq_limit; + + cmd->srq_type = (attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_TYPE) ? + attr_ex->srq_type : IBV_SRQT_BASIC; + if (attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_XRCD) { + if (!(attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_XRCD) || + !(attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_CQ)) + return EINVAL; + + vxrcd = container_of(attr_ex->xrcd, struct verbs_xrcd, xrcd); + cmd->xrcd_handle = vxrcd->handle; + cmd->cq_handle = attr_ex->cq->handle; + } + + if (write(context->cmd_fd, cmd, cmd_size) != cmd_size) + return errno; + + VALGRIND_MAKE_MEM_DEFINED(resp, resp_size); + + srq->srq.handle = resp->srq_handle; + srq->srq.context = context; + srq->srq.srq_context = attr_ex->srq_context; + srq->srq.pd = attr_ex->pd; + srq->srq.events_completed = 0; + pthread_mutex_init(&srq->srq.mutex, NULL); + pthread_cond_init(&srq->srq.cond, NULL); + + srq->comp_mask = IBV_SRQ_INIT_ATTR_TYPE; + srq->srq_type = (attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_TYPE) ? + attr_ex->srq_type : IBV_SRQT_BASIC; + if (srq->srq_type == IBV_SRQT_XRC) { + srq->comp_mask |= VERBS_SRQ_NUM; + srq->srq_num = resp->srqn; + } + if (attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_XRCD) { + srq->comp_mask |= VERBS_SRQ_XRCD; + srq->xrcd = vxrcd; + } + if (attr_ex->comp_mask & IBV_SRQ_INIT_ATTR_CQ) { + srq->comp_mask |= VERBS_SRQ_CQ; + srq->cq = attr_ex->cq; + } + + attr_ex->attr.max_wr = resp->max_wr; + attr_ex->attr.max_sge = resp->max_sge; + + return 0; +} + + static int ibv_cmd_modify_srq_v3(struct ibv_srq *srq, struct ibv_srq_attr *srq_attr, int srq_attr_mask, diff --git a/src/libibverbs.map b/src/libibverbs.map index 9a15f3f..c8ec645 100644 --- a/src/libibverbs.map +++ b/src/libibverbs.map @@ -100,5 +100,6 @@ IBVERBS_1.1 { ibv_cmd_open_xrcd; ibv_cmd_close_xrcd; + ibv_cmd_create_srq_ex; } IBVERBS_1.0; -- 1.7.3 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html