On Sun, 2014-02-23 at 14:19 +0200, Sagi Grimberg wrote:
> Add logic to initialize protection information entities.
> Upon each iSCSI task, we keep the scsi_cmnd in order to
> query the scsi protection operations and reference to
> protection buffers.
>
> Modify iser_fast_reg_mr to receive indication weather it
> is registering the data or protection buffers.
>
> In addition Introduce iser_reg_sig_mr which performs fast
> registration work-request for a signature enabled memory region
> (IB_WR_REG_SIG_MR). In this routine we set all the protection
> relevants for the device to offload protection data-transfer
> and verification.
>
> Signed-off-by: Sagi Grimberg <[email protected]>
> ---
> drivers/infiniband/ulp/iser/iscsi_iser.c | 2 +
> drivers/infiniband/ulp/iser/iscsi_iser.h | 8 +
> drivers/infiniband/ulp/iser/iser_initiator.c | 41 ++++-
> drivers/infiniband/ulp/iser/iser_memory.c | 255
> +++++++++++++++++++++++---
> 4 files changed, 280 insertions(+), 26 deletions(-)
>
<SNIP>
> diff --git a/drivers/infiniband/ulp/iser/iser_memory.c
> b/drivers/infiniband/ulp/iser/iser_memory.c
> index 3edab18..9729aae 100644
> --- a/drivers/infiniband/ulp/iser/iser_memory.c
> +++ b/drivers/infiniband/ulp/iser/iser_memory.c
<SNIP>
> @@ -471,35 +646,42 @@ static int iser_fast_reg_mr(struct iscsi_iser_task
> *iser_task,
> return 0;
> }
>
> - plen = iser_sg_to_page_vec(mem, device->ib_device,
> - desc->data_frpl->page_list,
> + if (ind == ISER_DATA_KEY_VALID) {
> + mr = desc->data_mr;
> + frpl = desc->data_frpl;
> + } else {
> + mr = desc->pi_ctx->prot_mr;
> + frpl = desc->pi_ctx->prot_frpl;
> + }
> +
> + 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;
> }
>
> - if (!(desc->reg_indicators & ISER_DATA_KEY_VALID)) {
> + if (!(desc->reg_indicators & ind)) {
> memset(&inv_wr, 0, sizeof(inv_wr));
> inv_wr.wr_id = ISER_FRWR_LI_WRID;
> inv_wr.opcode = IB_WR_LOCAL_INV;
> - inv_wr.ex.invalidate_rkey = desc->data_mr->rkey;
> + inv_wr.ex.invalidate_rkey = mr->rkey;
> wr = &inv_wr;
> /* Bump the key */
> - key = (u8)(desc->data_mr->rkey & 0x000000FF);
> - ib_update_fast_reg_key(desc->data_mr, ++key);
> + key = (u8)(mr->rkey & 0x000000FF);
> + ib_update_fast_reg_key(mr, ++key);
> }
>
> /* Prepare FASTREG WR */
> memset(&fastreg_wr, 0, sizeof(fastreg_wr));
> fastreg_wr.wr_id = ISER_FRWR_LI_WRID;
> fastreg_wr.opcode = IB_WR_FAST_REG_MR;
> - fastreg_wr.wr.fast_reg.iova_start = desc->data_frpl->page_list[0] +
> offset;
> - fastreg_wr.wr.fast_reg.page_list = desc->data_frpl;
> + fastreg_wr.wr.fast_reg.iova_start = frpl->page_list[0] + offset;
> + fastreg_wr.wr.fast_reg.page_list = frpl;
> fastreg_wr.wr.fast_reg.page_list_len = plen;
> fastreg_wr.wr.fast_reg.page_shift = SHIFT_4K;
> fastreg_wr.wr.fast_reg.length = size;
> - fastreg_wr.wr.fast_reg.rkey = desc->data_mr->rkey;
> + fastreg_wr.wr.fast_reg.rkey = mr->rkey;
> fastreg_wr.wr.fast_reg.access_flags = (IB_ACCESS_LOCAL_WRITE |
> IB_ACCESS_REMOTE_WRITE |
> IB_ACCESS_REMOTE_READ);
This one did not apply on v3.14-rc2 either. Fixed up the context
change.
Please verify this patch in target-pending/rdma-dif is what you expect.
--nab
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