From 6ef8bb837dd7e60f078084d4842a43fd163fb4a2 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Tue, 14 Apr 2015 18:08:25 +0300 Subject: IB/iser: Pass struct iser_mem_reg to iser_fast_reg_mr and iser_reg_sig_mr Instead of passing ib_sge as output variable, we pass the mem_reg pointer to have the routines fill the rkey as well. This reduces code duplication and extra assignments. This is a preparation step to unify some registration logics together. Also, pass iser_fast_reg_mr the fastreg descriptor directly. This patch does not change any functionality. Signed-off-by: Sagi Grimberg Signed-off-by: Adir Lev Signed-off-by: Doug Ledford --- drivers/infiniband/ulp/iser/iser_memory.c | 75 +++++++++++++------------------ 1 file changed, 32 insertions(+), 43 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c index 40d22d5..0575052 100644 --- a/drivers/infiniband/ulp/iser/iser_memory.c +++ b/drivers/infiniband/ulp/iser/iser_memory.c @@ -590,8 +590,10 @@ iser_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) static int iser_reg_sig_mr(struct iscsi_iser_task *iser_task, - struct fast_reg_descriptor *desc, struct ib_sge *data_sge, - struct ib_sge *prot_sge, struct ib_sge *sig_sge) + struct fast_reg_descriptor *desc, + struct iser_mem_reg *data_reg, + struct iser_mem_reg *prot_reg, + struct iser_mem_reg *sig_reg) { struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn; struct iser_pi_context *pi_ctx = desc->pi_ctx; @@ -615,12 +617,12 @@ iser_reg_sig_mr(struct iscsi_iser_task *iser_task, memset(&sig_wr, 0, sizeof(sig_wr)); sig_wr.opcode = IB_WR_REG_SIG_MR; sig_wr.wr_id = ISER_FASTREG_LI_WRID; - sig_wr.sg_list = data_sge; + sig_wr.sg_list = &data_reg->sge; sig_wr.num_sge = 1; sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; if (scsi_prot_sg_count(iser_task->sc)) - sig_wr.wr.sig_handover.prot = prot_sge; + sig_wr.wr.sig_handover.prot = &prot_reg->sge; sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE; @@ -637,24 +639,24 @@ iser_reg_sig_mr(struct iscsi_iser_task *iser_task, } desc->reg_indicators &= ~ISER_SIG_KEY_VALID; - sig_sge->lkey = pi_ctx->sig_mr->lkey; - sig_sge->addr = 0; - sig_sge->length = scsi_transfer_length(iser_task->sc); + sig_reg->sge.lkey = pi_ctx->sig_mr->lkey; + sig_reg->rkey = pi_ctx->sig_mr->rkey; + sig_reg->sge.addr = 0; + sig_reg->sge.length = scsi_transfer_length(iser_task->sc); - iser_dbg("sig_sge: addr: 0x%llx length: %u lkey: 0x%x\n", - sig_sge->addr, sig_sge->length, - sig_sge->lkey); + iser_dbg("sig_sge: lkey: 0x%x, rkey: 0x%x, addr: 0x%llx, length: %u\n", + sig_reg->sge.lkey, sig_reg->rkey, sig_reg->sge.addr, + sig_reg->sge.length); err: return ret; } static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task, - struct iser_mem_reg *mem_reg, struct iser_data_buf *mem, + struct fast_reg_descriptor *desc, enum iser_reg_indicator ind, - struct ib_sge *sge) + struct iser_mem_reg *reg) { - struct fast_reg_descriptor *desc = mem_reg->mem_h; struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn; struct iser_device *device = ib_conn->device; struct ib_device *ibdev = device->ib_device; @@ -668,12 +670,13 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task, if (mem->dma_nents == 1) { struct scatterlist *sg = mem->sg; - sge->lkey = device->mr->lkey; - sge->addr = ib_sg_dma_address(ibdev, &sg[0]); - sge->length = ib_sg_dma_len(ibdev, &sg[0]); + reg->sge.lkey = device->mr->lkey; + reg->rkey = device->mr->rkey; + reg->sge.addr = ib_sg_dma_address(ibdev, &sg[0]); + reg->sge.length = ib_sg_dma_len(ibdev, &sg[0]); iser_dbg("Single DMA entry: lkey=0x%x, addr=0x%llx, length=0x%x\n", - sge->lkey, sge->addr, sge->length); + reg->sge.lkey, reg->sge.addr, reg->sge.length); return 0; } @@ -723,9 +726,10 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task, } desc->reg_indicators &= ~ind; - sge->lkey = mr->lkey; - sge->addr = frpl->page_list[0] + offset; - sge->length = size; + reg->sge.lkey = mr->lkey; + reg->rkey = mr->rkey; + reg->sge.addr = frpl->page_list[0] + offset; + reg->sge.length = size; return ret; } @@ -745,7 +749,6 @@ int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *iser_task, struct iser_data_buf *mem = &iser_task->data[cmd_dir]; struct iser_mem_reg *mem_reg = &iser_task->rdma_reg[cmd_dir]; struct fast_reg_descriptor *desc = NULL; - struct ib_sge data_sge; int err, aligned_len; aligned_len = iser_data_buf_aligned_len(mem, ibdev); @@ -764,15 +767,15 @@ int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *iser_task, mem_reg->mem_h = desc; } - err = iser_fast_reg_mr(iser_task, mem_reg, mem, - ISER_DATA_KEY_VALID, &data_sge); + err = iser_fast_reg_mr(iser_task, mem, desc, + ISER_DATA_KEY_VALID, mem_reg); if (err) goto err_reg; if (scsi_get_prot_op(iser_task->sc) != SCSI_PROT_NORMAL) { - struct ib_sge prot_sge, sig_sge; + struct iser_mem_reg prot_reg; - memset(&prot_sge, 0, sizeof(prot_sge)); + memset(&prot_reg, 0, sizeof(prot_reg)); if (scsi_prot_sg_count(iser_task->sc)) { mem = &iser_task->prot[cmd_dir]; aligned_len = iser_data_buf_aligned_len(mem, ibdev); @@ -785,33 +788,19 @@ int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *iser_task, } } - err = iser_fast_reg_mr(iser_task, mem_reg, mem, - ISER_PROT_KEY_VALID, &prot_sge); + err = iser_fast_reg_mr(iser_task, mem, desc, + ISER_PROT_KEY_VALID, &prot_reg); if (err) goto err_reg; } - err = iser_reg_sig_mr(iser_task, desc, &data_sge, - &prot_sge, &sig_sge); + err = iser_reg_sig_mr(iser_task, desc, mem_reg, + &prot_reg, mem_reg); if (err) { iser_err("Failed to register signature mr\n"); return err; } desc->reg_indicators |= ISER_FASTREG_PROTECTED; - - mem_reg->sge.lkey = sig_sge.lkey; - mem_reg->rkey = desc->pi_ctx->sig_mr->rkey; - mem_reg->sge.addr = sig_sge.addr; - mem_reg->sge.length = sig_sge.length; - } else { - if (desc) - mem_reg->rkey = desc->data_mr->rkey; - else - mem_reg->rkey = device->mr->rkey; - - mem_reg->sge.lkey = data_sge.lkey; - mem_reg->sge.addr = data_sge.addr; - mem_reg->sge.length = data_sge.length; } return 0; -- cgit v1.1