[03/12] IB/core: allow passing mapping an offset into the SG in ib_map_mr_sg

Message ID	1460410360-13104-4-git-send-email-hch@lst.de (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-rdma-owner@kernel.org> From: Christoph Hellwig <hch@lst.de> To: dledford@redhat.com Cc: bart.vanassche@sandisk.com, swise@opengridcomputing.com, sagi@grimberg.me, linux-rdma@vger.kernel.org, target-devel@vger.kernel.org Subject: [PATCH 03/12] IB/core: allow passing mapping an offset into the SG in ib_map_mr_sg Date: Mon, 11 Apr 2016 14:32:31 -0700 Message-Id: <1460410360-13104-4-git-send-email-hch@lst.de> In-Reply-To: <1460410360-13104-1-git-send-email-hch@lst.de> References: <1460410360-13104-1-git-send-email-hch@lst.de> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 15b8adb..064dbef 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1597,6 +1597,7 @@ EXPORT_SYMBOL(ib_set_vf_guid); * @mr: memory region * @sg: dma mapped scatterlist * @sg_nents: number of entries in sg + * @sg_offset: offset in bytes into sg * @page_size: page vector desired page size * * Constraints: @@ -1615,17 +1616,15 @@ EXPORT_SYMBOL(ib_set_vf_guid); * After this completes successfully, the memory region * is ready for registration. */ -int ib_map_mr_sg(struct ib_mr *mr, - struct scatterlist *sg, - int sg_nents, - unsigned int page_size) +int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset, unsigned int page_size) { if (unlikely(!mr->device->map_mr_sg)) return -ENOSYS; mr->page_size = page_size; - return mr->device->map_mr_sg(mr, sg, sg_nents); + return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset); } EXPORT_SYMBOL(ib_map_mr_sg); @@ -1635,6 +1634,7 @@ EXPORT_SYMBOL(ib_map_mr_sg); * @mr: memory region * @sgl: dma mapped scatterlist * @sg_nents: number of entries in sg + * @sg_offset: offset in bytes into sg * @set_page: driver page assignment function pointer * * Core service helper for drivers to convert the largest @@ -1645,10 +1645,8 @@ EXPORT_SYMBOL(ib_map_mr_sg); * Returns the number of sg elements that were assigned to * a page vector. */ -int ib_sg_to_pages(struct ib_mr *mr, - struct scatterlist *sgl, - int sg_nents, - int (*set_page)(struct ib_mr *, u64)) +int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, + unsigned int sg_offset, int (*set_page)(struct ib_mr *, u64)) { struct scatterlist *sg; u64 last_end_dma_addr = 0; @@ -1656,12 +1654,12 @@ int ib_sg_to_pages(struct ib_mr *mr, u64 page_mask = ~((u64)mr->page_size - 1); int i, ret; - mr->iova = sg_dma_address(&sgl[0]); + mr->iova = sg_dma_address(&sgl[0]) + sg_offset; mr->length = 0; for_each_sg(sgl, sg, sg_nents, i) { - u64 dma_addr = sg_dma_address(sg); - unsigned int dma_len = sg_dma_len(sg); + u64 dma_addr = sg_dma_address(sg) + sg_offset; + unsigned int dma_len = sg_dma_len(sg) - sg_offset; u64 end_dma_addr = dma_addr + dma_len; u64 page_addr = dma_addr & page_mask; @@ -1694,6 +1692,8 @@ next_page: mr->length += dma_len; last_end_dma_addr = end_dma_addr; last_page_off = end_dma_addr & ~page_mask; + + sg_offset = 0; } return i; diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c index 42a7b89..1423538 100644 --- a/drivers/infiniband/hw/cxgb3/iwch_provider.c +++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c @@ -783,15 +783,14 @@ static int iwch_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -static int iwch_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +static int iwch_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, + int sg_nents, unsigned sg_offset) { struct iwch_mr *mhp = to_iwch_mr(ibmr); mhp->npages = 0; - return ib_sg_to_pages(ibmr, sg, sg_nents, iwch_set_page); + return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, iwch_set_page); } static int iwch_destroy_qp(struct ib_qp *ib_qp) diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h index df43f87..067cb3f 100644 --- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h +++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h @@ -917,9 +917,8 @@ void c4iw_qp_rem_ref(struct ib_qp *qp); struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, u32 max_num_sg); -int c4iw_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents); +int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset); int c4iw_dealloc_mw(struct ib_mw *mw); struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd, enum ib_mw_type type, struct ib_udata *udata); diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c index 008be07..38afb3d 100644 --- a/drivers/infiniband/hw/cxgb4/mem.c +++ b/drivers/infiniband/hw/cxgb4/mem.c @@ -690,15 +690,14 @@ static int c4iw_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -int c4iw_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset) { struct c4iw_mr *mhp = to_c4iw_mr(ibmr); mhp->mpl_len = 0; - return ib_sg_to_pages(ibmr, sg, sg_nents, c4iw_set_page); + return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, c4iw_set_page); } int c4iw_dereg_mr(struct ib_mr *ib_mr) diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h index 1eca01c..ba32817 100644 --- a/drivers/infiniband/hw/mlx4/mlx4_ib.h +++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h @@ -717,9 +717,8 @@ int mlx4_ib_dealloc_mw(struct ib_mw *mw); struct ib_mr *mlx4_ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, u32 max_num_sg); -int mlx4_ib_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents); +int mlx4_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset); int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period); int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata); struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c index ce0b5aa..b04f623 100644 --- a/drivers/infiniband/hw/mlx4/mr.c +++ b/drivers/infiniband/hw/mlx4/mr.c @@ -528,9 +528,8 @@ static int mlx4_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -int mlx4_ib_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +int mlx4_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset) { struct mlx4_ib_mr *mr = to_mmr(ibmr); int rc; @@ -541,7 +540,7 @@ int mlx4_ib_map_mr_sg(struct ib_mr *ibmr, sizeof(u64) * mr->max_pages, DMA_TO_DEVICE); - rc = ib_sg_to_pages(ibmr, sg, sg_nents, mlx4_set_page); + rc = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, mlx4_set_page); ib_dma_sync_single_for_device(ibmr->device, mr->page_map, sizeof(u64) * mr->max_pages, diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index b46c255..8c835b2 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -712,9 +712,8 @@ int mlx5_ib_dereg_mr(struct ib_mr *ibmr); struct ib_mr *mlx5_ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, u32 max_num_sg); -int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents); +int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset); int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh, const struct ib_mad_hdr *in, size_t in_mad_size, diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 4d5bff1..b678eac 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1751,24 +1751,27 @@ done: static int mlx5_ib_sg_to_klms(struct mlx5_ib_mr *mr, struct scatterlist *sgl, - unsigned short sg_nents) + unsigned short sg_nents, + unsigned int sg_offset) { struct scatterlist *sg = sgl; struct mlx5_klm *klms = mr->descs; u32 lkey = mr->ibmr.pd->local_dma_lkey; int i; - mr->ibmr.iova = sg_dma_address(sg); + mr->ibmr.iova = sg_dma_address(sg) + sg_offset; mr->ibmr.length = 0; mr->ndescs = sg_nents; for_each_sg(sgl, sg, sg_nents, i) { if (unlikely(i > mr->max_descs)) break; - klms[i].va = cpu_to_be64(sg_dma_address(sg)); - klms[i].bcount = cpu_to_be32(sg_dma_len(sg)); + klms[i].va = cpu_to_be64(sg_dma_address(sg) + sg_offset); + klms[i].bcount = cpu_to_be32(sg_dma_len(sg) - sg_offset); klms[i].key = cpu_to_be32(lkey); mr->ibmr.length += sg_dma_len(sg); + + sg_offset = 0; } return i; @@ -1788,9 +1791,8 @@ static int mlx5_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset) { struct mlx5_ib_mr *mr = to_mmr(ibmr); int n; @@ -1802,9 +1804,10 @@ int mlx5_ib_map_mr_sg(struct ib_mr *ibmr, DMA_TO_DEVICE); if (mr->access_mode == MLX5_ACCESS_MODE_KLM) - n = mlx5_ib_sg_to_klms(mr, sg, sg_nents); + n = mlx5_ib_sg_to_klms(mr, sg, sg_nents, sg_offset); else - n = ib_sg_to_pages(ibmr, sg, sg_nents, mlx5_set_page); + n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, + mlx5_set_page); ib_dma_sync_single_for_device(ibmr->device, mr->desc_map, mr->desc_size * mr->max_descs, diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c index fba69a3..698aab6 100644 --- a/drivers/infiniband/hw/nes/nes_verbs.c +++ b/drivers/infiniband/hw/nes/nes_verbs.c @@ -402,15 +402,14 @@ static int nes_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -static int nes_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +static int nes_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, + int sg_nents, unsigned int sg_offset) { struct nes_mr *nesmr = to_nesmr(ibmr); nesmr->npages = 0; - return ib_sg_to_pages(ibmr, sg, sg_nents, nes_set_page); + return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, nes_set_page); } /** diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c index a8496a1..9ddd550 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c +++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c @@ -3081,13 +3081,12 @@ static int ocrdma_set_page(struct ib_mr *ibmr, u64 addr) return 0; } -int ocrdma_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents) +int ocrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset) { struct ocrdma_mr *mr = get_ocrdma_mr(ibmr); mr->npages = 0; - return ib_sg_to_pages(ibmr, sg, sg_nents, ocrdma_set_page); + return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, ocrdma_set_page); } diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h index 8b517fd..b290e5d 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h +++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h @@ -122,8 +122,7 @@ struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *, u64 start, u64 length, struct ib_mr *ocrdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, u32 max_num_sg); -int ocrdma_map_mr_sg(struct ib_mr *ibmr, - struct scatterlist *sg, - int sg_nents); +int ocrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned sg_offset); #endif /* __OCRDMA_VERBS_H__ */ diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c index 9a391cc..44cc85f 100644 --- a/drivers/infiniband/ulp/iser/iser_memory.c +++ b/drivers/infiniband/ulp/iser/iser_memory.c @@ -236,7 +236,7 @@ int iser_fast_reg_fmr(struct iscsi_iser_task *iser_task, page_vec->npages = 0; page_vec->fake_mr.page_size = SIZE_4K; plen = ib_sg_to_pages(&page_vec->fake_mr, mem->sg, - mem->size, iser_set_page); + mem->size, 0, iser_set_page); if (unlikely(plen < mem->size)) { iser_err("page vec too short to hold this SG\n"); iser_data_buf_dump(mem, device->ib_device); @@ -446,7 +446,7 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task, ib_update_fast_reg_key(mr, ib_inc_rkey(mr->rkey)); - n = ib_map_mr_sg(mr, mem->sg, mem->size, SIZE_4K); + n = ib_map_mr_sg(mr, mem->sg, mem->size, 0, SIZE_4K); if (unlikely(n != mem->size)) { iser_err("failed to map sg (%d/%d)\n", n, mem->size); diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 411e446..a44a736 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -2461,7 +2461,7 @@ isert_fast_reg_mr(struct isert_conn *isert_conn, wr = &inv_wr; } - n = ib_map_mr_sg(mr, mem->sg, mem->nents, PAGE_SIZE); + n = ib_map_mr_sg(mr, mem->sg, mem->nents, 0, PAGE_SIZE); if (unlikely(n != mem->nents)) { isert_err("failed to map mr sg (%d/%d)\n", n, mem->nents); diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index b6bf204..ca425f2 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -1333,7 +1333,7 @@ static int srp_map_finish_fr(struct srp_map_state *state, rkey = ib_inc_rkey(desc->mr->rkey); ib_update_fast_reg_key(desc->mr, rkey); - n = ib_map_mr_sg(desc->mr, state->sg, sg_nents, dev->mr_page_size); + n = ib_map_mr_sg(desc->mr, state->sg, sg_nents, 0, dev->mr_page_size); if (unlikely(n < 0)) return n; diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index fb2cef4..24d0d82 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1827,7 +1827,8 @@ struct ib_device { u32 max_num_sg); int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, - int sg_nents); + int sg_nents, + unsigned sg_offset); struct ib_mw * (*alloc_mw)(struct ib_pd *pd, enum ib_mw_type type, struct ib_udata *udata); @@ -3111,29 +3112,23 @@ 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); +int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset, 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) +ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, + unsigned int sg_offset, unsigned int page_size) { int n; - n = ib_map_mr_sg(mr, sg, sg_nents, page_size); + n = ib_map_mr_sg(mr, sg, sg_nents, sg_offset, 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)); +int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, + unsigned int sg_offset, int (*set_page)(struct ib_mr *, u64)); void ib_drain_rq(struct ib_qp *qp); void ib_drain_sq(struct ib_qp *qp); diff --git a/net/rds/ib_frmr.c b/net/rds/ib_frmr.c index 93ff038..d921adc 100644 --- a/net/rds/ib_frmr.c +++ b/net/rds/ib_frmr.c @@ -111,7 +111,7 @@ static int rds_ib_post_reg_frmr(struct rds_ib_mr *ibmr) cpu_relax(); } - ret = ib_map_mr_sg_zbva(frmr->mr, ibmr->sg, ibmr->sg_len, PAGE_SIZE); + ret = ib_map_mr_sg_zbva(frmr->mr, ibmr->sg, ibmr->sg_len, 0, PAGE_SIZE); if (unlikely(ret != ibmr->sg_len)) return ret < 0 ? ret : -EINVAL; diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index c250924..3274a4a 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -421,7 +421,7 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, return -ENOMEM; } - n = ib_map_mr_sg(mr, frmr->sg, frmr->sg_nents, PAGE_SIZE); + n = ib_map_mr_sg(mr, frmr->sg, frmr->sg_nents, 0, PAGE_SIZE); if (unlikely(n != frmr->sg_nents)) { pr_err("RPC: %s: failed to map mr %p (%u/%u)\n", __func__, frmr->fr_mr, n, frmr->sg_nents); diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 3b24a64..19a74e9 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -281,7 +281,7 @@ int rdma_read_chunk_frmr(struct svcxprt_rdma *xprt, } atomic_inc(&xprt->sc_dma_used); - n = ib_map_mr_sg(frmr->mr, frmr->sg, frmr->sg_nents, PAGE_SIZE); + n = ib_map_mr_sg(frmr->mr, frmr->sg, frmr->sg_nents, 0, PAGE_SIZE); if (unlikely(n != frmr->sg_nents)) { pr_err("svcrdma: failed to map mr %p (%d/%d elements)\n", frmr->mr, n, frmr->sg_nents);

[03/12] IB/core: allow passing mapping an offset into the SG in ib_map_mr_sg

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