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RDMA/core: Introduce IB_MR_TYPE_INTEGRITY and ib_alloc_mr_integrity API 

This is a preparation for signature verbs API re-design. In the new
design a single MR with IB_MR_TYPE_INTEGRITY type will be used to perform
the needed mapping for data integrity operations.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Israel Rukshin 2019-06-11 18:52:39 +03:00 committed by Jason Gunthorpe
parent a0bc099abf
commit 26bc7eaee9
3 changed files with 57 additions and 0 deletions
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1
drivers/infiniband/core/device.c
View File

@ -2437,6 +2437,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
SET_DEVICE_OP(dev_ops, alloc_fmr);
SET_DEVICE_OP(dev_ops, alloc_hw_stats);
SET_DEVICE_OP(dev_ops, alloc_mr);
SET_DEVICE_OP(dev_ops, alloc_mr_integrity);
SET_DEVICE_OP(dev_ops, alloc_mw);
SET_DEVICE_OP(dev_ops, alloc_pd);
SET_DEVICE_OP(dev_ops, alloc_rdma_netdev);

46
drivers/infiniband/core/verbs.c
View File

@ -2011,6 +2011,9 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
if (!pd->device->ops.alloc_mr)
return ERR_PTR(-EOPNOTSUPP);
if (WARN_ON_ONCE(mr_type == IB_MR_TYPE_INTEGRITY))
return ERR_PTR(-EINVAL);
mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, udata);
if (!IS_ERR(mr)) {
mr->device = pd->device;
@ -2028,6 +2031,49 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
}
EXPORT_SYMBOL(ib_alloc_mr_user);
/**
* ib_alloc_mr_integrity() - Allocates an integrity memory region
* @pd: protection domain associated with the region
* @max_num_data_sg: maximum data sg entries available for registration
* @max_num_meta_sg: maximum metadata sg entries available for
* registration
*
* Notes:
* Memory registration page/sg lists must not exceed max_num_sg,
* also the integrity page/sg lists must not exceed max_num_meta_sg.
*
*/
struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
u32 max_num_data_sg,
u32 max_num_meta_sg)
{
struct ib_mr *mr;
if (!pd->device->ops.alloc_mr_integrity)
return ERR_PTR(-EOPNOTSUPP);
if (!max_num_meta_sg)
return ERR_PTR(-EINVAL);
mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
max_num_meta_sg);
if (IS_ERR(mr))
return mr;
mr->device = pd->device;
mr->pd = pd;
mr->dm = NULL;
mr->uobject = NULL;
atomic_inc(&pd->usecnt);
mr->need_inval = false;
mr->res.type = RDMA_RESTRACK_MR;
rdma_restrack_kadd(&mr->res);
mr->type = IB_MR_TYPE_INTEGRITY;
return mr;
}
EXPORT_SYMBOL(ib_alloc_mr_integrity);
/* "Fast" memory regions */
struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,

10
include/rdma/ib_verbs.h
View File

@ -788,6 +788,8 @@ __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
* application
* @IB_MR_TYPE_DMA: memory region that is used for DMA operations
* without address translations (VA=PA)
* @IB_MR_TYPE_INTEGRITY: memory region that is used for
* data integrity operations
*/
enum ib_mr_type {
IB_MR_TYPE_MEM_REG,
@ -796,6 +798,7 @@ enum ib_mr_type {
IB_MR_TYPE_DM,
IB_MR_TYPE_USER,
IB_MR_TYPE_DMA,
IB_MR_TYPE_INTEGRITY,
};
enum ib_mr_status_check {
@ -2363,6 +2366,9 @@ struct ib_device_ops {
int (*dereg_mr)(struct ib_mr *mr, struct ib_udata *udata);
struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type,
u32 max_num_sg, struct ib_udata *udata);
struct ib_mr *(*alloc_mr_integrity)(struct ib_pd *pd,
u32 max_num_data_sg,
u32 max_num_meta_sg);
int (*advise_mr)(struct ib_pd *pd,
enum ib_uverbs_advise_mr_advice advice, u32 flags,
struct ib_sge *sg_list, u32 num_sge,
@ -4042,6 +4048,10 @@ static inline struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
return ib_alloc_mr_user(pd, mr_type, max_num_sg, NULL);
}
struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
u32 max_num_data_sg,
u32 max_num_meta_sg);
/**
* ib_update_fast_reg_key - updates the key portion of the fast_reg MR
* R_Key and L_Key.