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IB/iser: Pass struct iser_mem_reg to iser_fast_reg_mr and iser_reg_sig_mr

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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 <sagig@mellanox.com>
Signed-off-by: Adir Lev <adirl@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sagi Grimberg 2015-04-14 18:08:25 +03:00 committed by Doug Ledford
parent 90a6684c30
commit 6ef8bb837d
1 changed files with 32 additions and 43 deletions
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75
drivers/infiniband/ulp/iser/iser_memory.c
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@ -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;