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Commit a69365a3 authored by santosh.shilimkar@oracle.com's avatar santosh.shilimkar@oracle.com Committed by David S. Miller
Browse files

RDS: IB: create struct rds_ib_fmr 



Keep fmr related filed in its own struct. Fastreg MR structure
will be added to the union.

Signed-off-by: default avatarSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f6df683f

net/rds/ib_fmr.c

+10 −7
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev, int npages) 
{

	struct rds_ib_mr_pool *pool;

	struct rds_ib_mr *ibmr = NULL;

	struct rds_ib_fmr *fmr;

	int err = 0, iter = 0;



	if (npages <= RDS_MR_8K_MSG_SIZE)
@@ -99,15 +100,16 @@ struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev, int npages) 
		goto out_no_cigar;

	}



	ibmr->fmr = ib_alloc_fmr(rds_ibdev->pd,

	fmr = &ibmr->u.fmr;

	fmr->fmr = ib_alloc_fmr(rds_ibdev->pd,

			(IB_ACCESS_LOCAL_WRITE |

			 IB_ACCESS_REMOTE_READ |

			 IB_ACCESS_REMOTE_WRITE |

			 IB_ACCESS_REMOTE_ATOMIC),

			&pool->fmr_attr);

	if (IS_ERR(ibmr->fmr)) {

		err = PTR_ERR(ibmr->fmr);

		ibmr->fmr = NULL;

	if (IS_ERR(fmr->fmr)) {

		err = PTR_ERR(fmr->fmr);

		fmr->fmr = NULL;

		pr_warn("RDS/IB: %s failed (err=%d)\n", __func__, err);

		goto out_no_cigar;

	}
@@ -122,8 +124,8 @@ struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev, int npages) 


out_no_cigar:

	if (ibmr) {

		if (ibmr->fmr)

			ib_dealloc_fmr(ibmr->fmr);

		if (fmr->fmr)

			ib_dealloc_fmr(fmr->fmr);

		kfree(ibmr);

	}

	atomic_dec(&pool->item_count);
@@ -134,6 +136,7 @@ int rds_ib_map_fmr(struct rds_ib_device *rds_ibdev, struct rds_ib_mr *ibmr, 
		   struct scatterlist *sg, unsigned int nents)

{

	struct ib_device *dev = rds_ibdev->dev;

	struct rds_ib_fmr *fmr = &ibmr->u.fmr;

	struct scatterlist *scat = sg;

	u64 io_addr = 0;

	u64 *dma_pages;
@@ -190,7 +193,7 @@ int rds_ib_map_fmr(struct rds_ib_device *rds_ibdev, struct rds_ib_mr *ibmr, 
				(dma_addr & PAGE_MASK) + j;

	}



	ret = ib_map_phys_fmr(ibmr->fmr, dma_pages, page_cnt, io_addr);

	ret = ib_map_phys_fmr(fmr->fmr, dma_pages, page_cnt, io_addr);

	if (ret)

		goto out;

net/rds/ib_mr.h

+9 −2
Original line number Diff line number Diff line
@@ -43,11 +43,15 @@ 
#define RDS_MR_8K_SCALE			(256 / (RDS_MR_8K_MSG_SIZE + 1))

#define RDS_MR_8K_POOL_SIZE		(RDS_MR_8K_SCALE * (8192 / 2))



struct rds_ib_fmr {

	struct ib_fmr		*fmr;

	u64			*dma;

};



/* This is stored as mr->r_trans_private. */

struct rds_ib_mr {

	struct rds_ib_device	*device;

	struct rds_ib_mr_pool	*pool;

	struct ib_fmr		*fmr;



	struct llist_node	llnode;
@@ -57,8 +61,11 @@ struct rds_ib_mr { 


	struct scatterlist	*sg;

	unsigned int		sg_len;

	u64			*dma;

	int			sg_dma_len;



	union {

		struct rds_ib_fmr	fmr;

	} u;

};



/* Our own little MR pool */

net/rds/ib_rdma.c

+10 −4
Original line number Diff line number Diff line
@@ -334,6 +334,7 @@ int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, 
			 int free_all, struct rds_ib_mr **ibmr_ret)

{

	struct rds_ib_mr *ibmr, *next;

	struct rds_ib_fmr *fmr;

	struct llist_node *clean_nodes;

	struct llist_node *clean_tail;

	LIST_HEAD(unmap_list);
@@ -395,8 +396,10 @@ int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, 
		goto out;



	/* String all ib_mr's onto one list and hand them to ib_unmap_fmr */

	list_for_each_entry(ibmr, &unmap_list, unmap_list)

		list_add(&ibmr->fmr->list, &fmr_list);

	list_for_each_entry(ibmr, &unmap_list, unmap_list) {

		fmr = &ibmr->u.fmr;

		list_add(&fmr->fmr->list, &fmr_list);

	}



	ret = ib_unmap_fmr(&fmr_list);

	if (ret)
@@ -405,6 +408,7 @@ int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, 
	/* Now we can destroy the DMA mapping and unpin any pages */

	list_for_each_entry_safe(ibmr, next, &unmap_list, unmap_list) {

		unpinned += ibmr->sg_len;

		fmr = &ibmr->u.fmr;

		__rds_ib_teardown_mr(ibmr);

		if (nfreed < free_goal ||

		    ibmr->remap_count >= pool->fmr_attr.max_maps) {
@@ -413,7 +417,7 @@ int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool, 
			else

				rds_ib_stats_inc(s_ib_rdma_mr_1m_free);

			list_del(&ibmr->unmap_list);

			ib_dealloc_fmr(ibmr->fmr);

			ib_dealloc_fmr(fmr->fmr);

			kfree(ibmr);

			nfreed++;

		}
@@ -517,6 +521,7 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents, 
{

	struct rds_ib_device *rds_ibdev;

	struct rds_ib_mr *ibmr = NULL;

	struct rds_ib_fmr *fmr;

	int ret;



	rds_ibdev = rds_ib_get_device(rs->rs_bound_addr);
@@ -536,9 +541,10 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents, 
		return ibmr;

	}



	fmr = &ibmr->u.fmr;

	ret = rds_ib_map_fmr(rds_ibdev, ibmr, sg, nents);

	if (ret == 0)

		*key_ret = ibmr->fmr->rkey;

		*key_ret = fmr->fmr->rkey;

	else

		printk(KERN_WARNING "RDS/IB: map_fmr failed (errno=%d)\n", ret);