diff mbox series

[07/17] RDMA/core: Introduce ib_map_mr_sg_pi to map data/protection sgl's

Message ID 1549302646-18446-8-git-send-email-maxg@mellanox.com (mailing list archive)
State Superseded
Headers show
Series Introduce new API for T10-PI offload | expand

Commit Message

Max Gurtovoy Feb. 4, 2019, 5:50 p.m. UTC 
This function will map the previously dma mapped SG lists for PI
(protection information) and data to an appropriate memory region for
future registration. The given MR must be allocated as IB_MR_TYPE_PI.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
---
 drivers/infiniband/core/device.c |  1 +
 drivers/infiniband/core/verbs.c  | 32 +++++++++++++++++++++++++++++++-
 include/rdma/ib_verbs.h          |  6 ++++++
 3 files changed, 38 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 6242665f4b5c..102878efe00b 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -1285,6 +1285,7 @@  void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
 	SET_DEVICE_OP(dev_ops, get_vf_config);
 	SET_DEVICE_OP(dev_ops, get_vf_stats);
 	SET_DEVICE_OP(dev_ops, map_mr_sg);
+	SET_DEVICE_OP(dev_ops, map_mr_sg_pi);
 	SET_DEVICE_OP(dev_ops, map_phys_fmr);
 	SET_DEVICE_OP(dev_ops, mmap);
 	SET_DEVICE_OP(dev_ops, modify_ah);
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index f30dbe9ea9fb..358ea4c44400 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2020,7 +2020,8 @@  struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
 {
 	struct ib_mr *mr;
 
-	if (!pd->device->ops.alloc_mr_integrity)
+	if (!pd->device->ops.alloc_mr_integrity ||
+	    !pd->device->ops.map_mr_sg_pi)
 		return ERR_PTR(-EOPNOTSUPP);
 
 	if (!max_num_meta_sg)
@@ -2402,6 +2403,35 @@  int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
 }
 EXPORT_SYMBOL(ib_set_vf_guid);
 
+/**
+ * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection
+ *     information) and set an appropriate memory region for registration.
+ * @mr:             memory region
+ * @data_ib_sg:     dma mapped scatterlist for data
+ * @meta_ib_sg:     dma mapped scatterlist for metadata
+ * @page_size:      page vector desired page size
+ *
+ * Constraints:
+ * - The MR must be allocated with type IB_MR_TYPE_PI.
+ *
+ * Returns the number of sg elements that were mapped to the memory region.
+ *
+ * After this completes successfully, the  memory region
+ * is ready for registration.
+ */
+int ib_map_mr_sg_pi(struct ib_mr *mr, struct ib_scatterlist *data_ib_sg,
+		    struct ib_scatterlist *meta_ib_sg, unsigned int page_size)
+{
+	if (unlikely(!mr->device->ops.map_mr_sg_pi ||
+		     WARN_ON_ONCE(mr->type != IB_MR_TYPE_PI)))
+		return -EOPNOTSUPP;
+
+	mr->page_size = page_size;
+
+	return mr->device->ops.map_mr_sg_pi(mr, data_ib_sg, meta_ib_sg);
+}
+EXPORT_SYMBOL(ib_map_mr_sg_pi);
+
 /**
  * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
  *     and set it the memory region.
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index f5d0df8d9fcb..a48f16590574 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2393,6 +2393,10 @@  struct ib_device_ops {
 	int (*read_counters)(struct ib_counters *counters,
 			     struct ib_counters_read_attr *counters_read_attr,
 			     struct uverbs_attr_bundle *attrs);
+	int (*map_mr_sg_pi)(struct ib_mr *mr,
+			    struct ib_scatterlist *data_ib_sg,
+			    struct ib_scatterlist *meta_ib_sg);
+
 	/**
 	 * alloc_hw_stats - Allocate a struct rdma_hw_stats and fill in the
 	 *   driver initialized data.  The struct is kfree()'ed by the sysfs
@@ -3854,6 +3858,8 @@  int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table);
 
 int ib_map_mr_sg(struct ib_mr *mr, struct ib_scatterlist *ib_sg,
 		 unsigned int page_size);
+int ib_map_mr_sg_pi(struct ib_mr *mr, struct ib_scatterlist *data_ib_sg,
+		    struct ib_scatterlist *meta_ib_sg, unsigned int page_size);
 
 static inline int
 ib_map_mr_sg_zbva(struct ib_mr *mr, struct ib_scatterlist *ib_sg,