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authorSagi Grimberg <sagig@mellanox.com>2015-10-13 19:11:24 +0300
committerDoug Ledford <dledford@redhat.com>2015-10-28 22:27:17 -0400
commit4c67e2bfc8b7121d51434362fa7c2d012f8bcf1b (patch)
treed262b24e2c9fe18611816437acc9a7e3526eb64d /include/rdma
parent63e8790d39a2d7c9a0ebeab987a6033d184bc6ba (diff)
IB/core: Introduce new fast registration API
The new fast registration verb ib_map_mr_sg receives a scatterlist and converts it to a page list under the verbs API thus hiding the specific HW mapping details away from the consumer. The provider drivers are provided with a generic helper ib_sg_to_pages that converts a scatterlist into a vector of page addresses. The drivers can still perform any HW specific page address setting by passing a set_page function pointer which will be invoked for each page address. This allows drivers to avoid keeping a shadow page vectors and convert them to HW specific translations by doing extra copies. This API will allow ULPs to remove the duplicated code of constructing a page vector from a given sg list. The send work request ib_reg_wr also shrinks as it will contain only mr, key and access flags in addition. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Tested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 85103aff909b..065d37c13aa6 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -738,6 +738,7 @@ enum ib_wc_opcode {
IB_WC_LSO,
IB_WC_LOCAL_INV,
IB_WC_FAST_REG_MR,
+ IB_WC_REG_MR,
IB_WC_MASKED_COMP_SWAP,
IB_WC_MASKED_FETCH_ADD,
/*
@@ -1025,6 +1026,7 @@ enum ib_wr_opcode {
IB_WR_RDMA_READ_WITH_INV,
IB_WR_LOCAL_INV,
IB_WR_FAST_REG_MR,
+ IB_WR_REG_MR,
IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
IB_WR_BIND_MW,
@@ -1157,6 +1159,18 @@ static inline struct ib_fast_reg_wr *fast_reg_wr(struct ib_send_wr *wr)
return container_of(wr, struct ib_fast_reg_wr, wr);
}
+struct ib_reg_wr {
+ struct ib_send_wr wr;
+ struct ib_mr *mr;
+ u32 key;
+ int access;
+};
+
+static inline struct ib_reg_wr *reg_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_reg_wr, wr);
+}
+
struct ib_bind_mw_wr {
struct ib_send_wr wr;
struct ib_mw *mw;
@@ -1369,6 +1383,9 @@ struct ib_mr {
struct ib_uobject *uobject;
u32 lkey;
u32 rkey;
+ u64 iova;
+ u32 length;
+ unsigned int page_size;
atomic_t usecnt; /* count number of MWs */
};
@@ -1753,6 +1770,9 @@ struct ib_device {
struct ib_mr * (*alloc_mr)(struct ib_pd *pd,
enum ib_mr_type mr_type,
u32 max_num_sg);
+ int (*map_mr_sg)(struct ib_mr *mr,
+ struct scatterlist *sg,
+ int sg_nents);
struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct ib_device *device,
int page_list_len);
void (*free_fast_reg_page_list)(struct ib_fast_reg_page_list *page_list);
@@ -3059,4 +3079,28 @@ 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);
+int ib_map_mr_sg(struct ib_mr *mr,
+ struct scatterlist *sg,
+ int sg_nents,
+ unsigned int page_size);
+
+static inline int
+ib_map_mr_sg_zbva(struct ib_mr *mr,
+ struct scatterlist *sg,
+ int sg_nents,
+ unsigned int page_size)
+{
+ int n;
+
+ n = ib_map_mr_sg(mr, sg, sg_nents, page_size);
+ mr->iova = 0;
+
+ return n;
+}
+
+int ib_sg_to_pages(struct ib_mr *mr,
+ struct scatterlist *sgl,
+ int sg_nents,
+ int (*set_page)(struct ib_mr *, u64));
+
#endif /* IB_VERBS_H */

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