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IB/iser: Port to new fast registration API

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Remove fastreg page list allocation as the page vector
is now private to the provider. Instead of constructing
the page list and fast_req work request, call ib_map_mr_sg
and construct ib_reg_wr.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sagi Grimberg 2015-10-13 19:11:33 +03:00 committed by Doug Ledford
parent 0ba24dd39a
commit 3940588500
3 changed files with 28 additions and 52 deletions
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10
drivers/infiniband/ulp/iser/iscsi_iser.h
View File

@ -230,7 +230,7 @@ enum iser_data_dir {
*/
struct iser_data_buf {
struct scatterlist *sg;
unsigned int size;
int size;
unsigned long data_len;
unsigned int dma_nents;
};
@ -297,7 +297,7 @@ struct iser_tx_desc {
u8 wr_idx;
union iser_wr {
struct ib_send_wr send;
struct ib_fast_reg_wr fast_reg;
struct ib_reg_wr fast_reg;
struct ib_sig_handover_wr sig;
} wrs[ISER_MAX_WRS];
struct iser_mem_reg data_reg;
@ -412,7 +412,6 @@ struct iser_device {
*
* @mr: memory region
* @fmr_pool: pool of fmrs
* @frpl: fast reg page list used by frwrs
* @page_vec: fast reg page list used by fmr pool
* @mr_valid: is mr valid indicator
*/
@ -421,10 +420,7 @@ struct iser_reg_resources {
struct ib_mr *mr;
struct ib_fmr_pool *fmr_pool;
};
union {
struct ib_fast_reg_page_list *frpl;
struct iser_page_vec *page_vec;
};
struct iser_page_vec *page_vec;
u8 mr_valid:1;
};

54
drivers/infiniband/ulp/iser/iser_memory.c
View File

@ -472,7 +472,7 @@ iser_reg_sig_mr(struct iscsi_iser_task *iser_task,
sig_reg->sge.addr = 0;
sig_reg->sge.length = scsi_transfer_length(iser_task->sc);
iser_dbg("sig reg: lkey: 0x%x, rkey: 0x%x, addr: 0x%llx, length: %u\n",
iser_dbg("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:
@ -484,47 +484,41 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task,
struct iser_reg_resources *rsc,
struct iser_mem_reg *reg)
{
struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
struct iser_device *device = ib_conn->device;
struct ib_mr *mr = rsc->mr;
struct ib_fast_reg_page_list *frpl = rsc->frpl;
struct iser_tx_desc *tx_desc = &iser_task->desc;
struct ib_fast_reg_wr *wr;
int offset, size, plen;
plen = iser_sg_to_page_vec(mem, device->ib_device, frpl->page_list,
&offset, &size);
if (plen * SIZE_4K < size) {
iser_err("fast reg page_list too short to hold this SG\n");
return -EINVAL;
}
struct ib_mr *mr = rsc->mr;
struct ib_reg_wr *wr;
int n;
if (!rsc->mr_valid)
iser_inv_rkey(iser_tx_next_wr(tx_desc), mr);
wr = fast_reg_wr(iser_tx_next_wr(tx_desc));
wr->wr.opcode = IB_WR_FAST_REG_MR;
n = ib_map_mr_sg(mr, mem->sg, mem->size, SIZE_4K);
if (unlikely(n != mem->size)) {
iser_err("failed to map sg (%d/%d)\n",
n, mem->size);
return n < 0 ? n : -EINVAL;
}
wr = reg_wr(iser_tx_next_wr(tx_desc));
wr->wr.opcode = IB_WR_REG_MR;
wr->wr.wr_id = ISER_FASTREG_LI_WRID;
wr->wr.send_flags = 0;
wr->iova_start = frpl->page_list[0] + offset;
wr->page_list = frpl;
wr->page_list_len = plen;
wr->page_shift = SHIFT_4K;
wr->length = size;
wr->rkey = mr->rkey;
wr->access_flags = (IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_READ);
wr->wr.num_sge = 0;
wr->mr = mr;
wr->key = mr->rkey;
wr->access = IB_ACCESS_LOCAL_WRITE |
IB_ACCESS_REMOTE_WRITE |
IB_ACCESS_REMOTE_READ;
rsc->mr_valid = 0;
reg->sge.lkey = mr->lkey;
reg->rkey = mr->rkey;
reg->sge.addr = frpl->page_list[0] + offset;
reg->sge.length = size;
reg->sge.addr = mr->iova;
reg->sge.length = mr->length;
iser_dbg("fast reg: lkey=0x%x, rkey=0x%x, addr=0x%llx,"
" length=0x%x\n", reg->sge.lkey, reg->rkey,
reg->sge.addr, reg->sge.length);
iser_dbg("lkey=0x%x rkey=0x%x addr=0x%llx length=0x%x\n",
reg->sge.lkey, reg->rkey, reg->sge.addr, reg->sge.length);
return 0;
}

16
drivers/infiniband/ulp/iser/iser_verbs.c
View File

@ -293,35 +293,21 @@ iser_alloc_reg_res(struct ib_device *ib_device,
{
int ret;
res->frpl = ib_alloc_fast_reg_page_list(ib_device, size);
if (IS_ERR(res->frpl)) {
ret = PTR_ERR(res->frpl);
iser_err("Failed to allocate ib_fast_reg_page_list err=%d\n",
ret);
return PTR_ERR(res->frpl);
}
res->mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, size);
if (IS_ERR(res->mr)) {
ret = PTR_ERR(res->mr);
iser_err("Failed to allocate ib_fast_reg_mr err=%d\n", ret);
goto fast_reg_mr_failure;
return ret;
}
res->mr_valid = 1;
return 0;
fast_reg_mr_failure:
ib_free_fast_reg_page_list(res->frpl);
return ret;
}
static void
iser_free_reg_res(struct iser_reg_resources *rsc)
{
ib_dereg_mr(rsc->mr);
ib_free_fast_reg_page_list(rsc->frpl);
}
static int