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Commit 3c75108f authored by Bhanu Prakash Gollapudi's avatar Bhanu Prakash Gollapudi Committed by James Bottomley
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[SCSI] bnx2fc: Tx BDs cache in write tasks 



When there is a single BD for the entire data to be transmitted, use the BD
inside the SGL context and set the cached SGE indication in the task context

Signed-off-by: default avatarBhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent fd08bd62

drivers/scsi/bnx2fc/bnx2fc_hwi.c

+22 −7
Original line number Diff line number Diff line
@@ -1711,7 +1711,21 @@ void bnx2fc_init_task(struct bnx2fc_cmd *io_req, 
		task_type = FCOE_TASK_TYPE_READ;



	/* Tx only */

	bd_count = bd_tbl->bd_valid;

	if (task_type == FCOE_TASK_TYPE_WRITE) {

		if ((dev_type == TYPE_DISK) && (bd_count == 1)) {

			struct fcoe_bd_ctx *fcoe_bd_tbl = bd_tbl->bd_tbl;



			task->txwr_only.sgl_ctx.cached_sge.cur_buf_addr.lo =

					fcoe_bd_tbl->buf_addr_lo;

			task->txwr_only.sgl_ctx.cached_sge.cur_buf_addr.hi =

					fcoe_bd_tbl->buf_addr_hi;

			task->txwr_only.sgl_ctx.cached_sge.cur_buf_rem =

					fcoe_bd_tbl->buf_len;



			task->txwr_rxrd.const_ctx.init_flags |= 1 <<

				FCOE_TCE_TX_WR_RX_RD_CONST_CACHED_SGE_SHIFT;

		} else {

			task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.lo =

					(u32)bd_tbl->bd_tbl_dma;

			task->txwr_only.sgl_ctx.sgl.mul_sgl.cur_sge_addr.hi =
@@ -1719,10 +1733,11 @@ void bnx2fc_init_task(struct bnx2fc_cmd *io_req, 
			task->txwr_only.sgl_ctx.sgl.mul_sgl.sgl_size =

					bd_tbl->bd_valid;

		}

	}



	/*Tx Write Rx Read */

	/* Init state to NORMAL */

	task->txwr_rxrd.const_ctx.init_flags = task_type <<

	task->txwr_rxrd.const_ctx.init_flags |= task_type <<

				FCOE_TCE_TX_WR_RX_RD_CONST_TASK_TYPE_SHIFT;

	if (dev_type == TYPE_TAPE)

		task->txwr_rxrd.const_ctx.init_flags |=