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authorYishai Hadas <yishaih@mellanox.com>2016-05-23 15:20:48 +0300
committerDoug Ledford <dledford@redhat.com>2016-06-23 11:02:43 -0400
commit5fd251c8b4c52da0d0916470a67fbb77b972125e (patch)
treea1268dd95778cd8d2c08a6877a97294470007e7b /include/rdma
parent16bd020147abeb37dd32cc6442cee2d32b1c1af0 (diff)
IB/core: Introduce Work Queue object and its verbs
Introduce Work Queue object and its create/destroy/modify verbs. QP can be created without internal WQs "packaged" inside it, this QP can be configured to use "external" WQ object as its receive/send queue. WQ is a necessary component for RSS technology since RSS mechanism is supposed to distribute the traffic between multiple Receive Work Queues. WQ associated (many to one) with Completion Queue and it owns WQ properties (PD, WQ size, etc.). WQ has a type, this patch introduces the IB_WQT_RQ (i.e.receive queue), it may be extend to others such as IB_WQT_SQ. (send queue). WQ from type IB_WQT_RQ contains receive work requests. PD is an attribute of a work queue (i.e. send/receive queue), it's used by the hardware for security validation before scattering to a memory region which is pointed by the WQ. For that, an external WQ object needs a PD, letting the hardware makes that validation. When accessing a memory region that is pointed by the WQ its PD is used and not the QP's PD, this behavior is similar to a SRQ and a QP. WQ context is subject to a well-defined state transitions done by the modify_wq verb. When WQ is created its initial state becomes IB_WQS_RESET. >From IB_WQS_RESET it can be modified to itself or to IB_WQS_RDY. >From IB_WQS_RDY it can be modified to itself, to IB_WQS_RESET or to IB_WQS_ERR. >From IB_WQS_ERR it can be modified to IB_WQS_RESET. Note: transition to IB_WQS_ERR might occur implicitly in case there was some HW error. Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Matan Barak <matanb@mellanox.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h56
1 files changed, 55 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 7e440d41487a..f2d954ac42f6 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1428,6 +1428,48 @@ struct ib_srq {
} ext;
};
+enum ib_wq_type {
+ IB_WQT_RQ
+};
+
+enum ib_wq_state {
+ IB_WQS_RESET,
+ IB_WQS_RDY,
+ IB_WQS_ERR
+};
+
+struct ib_wq {
+ struct ib_device *device;
+ struct ib_uobject *uobject;
+ void *wq_context;
+ void (*event_handler)(struct ib_event *, void *);
+ struct ib_pd *pd;
+ struct ib_cq *cq;
+ u32 wq_num;
+ enum ib_wq_state state;
+ enum ib_wq_type wq_type;
+ atomic_t usecnt;
+};
+
+struct ib_wq_init_attr {
+ void *wq_context;
+ enum ib_wq_type wq_type;
+ u32 max_wr;
+ u32 max_sge;
+ struct ib_cq *cq;
+ void (*event_handler)(struct ib_event *, void *);
+};
+
+enum ib_wq_attr_mask {
+ IB_WQ_STATE = 1 << 0,
+ IB_WQ_CUR_STATE = 1 << 1,
+};
+
+struct ib_wq_attr {
+ enum ib_wq_state wq_state;
+ enum ib_wq_state curr_wq_state;
+};
+
struct ib_qp {
struct ib_device *device;
struct ib_pd *pd;
@@ -1921,7 +1963,14 @@ struct ib_device {
struct ifla_vf_stats *stats);
int (*set_vf_guid)(struct ib_device *device, int vf, u8 port, u64 guid,
int type);
-
+ struct ib_wq * (*create_wq)(struct ib_pd *pd,
+ struct ib_wq_init_attr *init_attr,
+ struct ib_udata *udata);
+ int (*destroy_wq)(struct ib_wq *wq);
+ int (*modify_wq)(struct ib_wq *wq,
+ struct ib_wq_attr *attr,
+ u32 wq_attr_mask,
+ struct ib_udata *udata);
struct ib_dma_mapping_ops *dma_ops;
struct module *owner;
@@ -3167,6 +3216,11 @@ int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
u16 pkey, const union ib_gid *gid,
const struct sockaddr *addr);
+struct ib_wq *ib_create_wq(struct ib_pd *pd,
+ struct ib_wq_init_attr *init_attr);
+int ib_destroy_wq(struct ib_wq *wq);
+int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *attr,
+ u32 wq_attr_mask);
int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
unsigned int *sg_offset, unsigned int page_size);