/*
* This file is part of the Chelsio FCoE driver for Linux.
*
* Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/compiler.h>
#include <linux/slab.h>
#include <asm/page.h>
#include <linux/cache.h>
#include "csio_hw.h"
#include "csio_wr.h"
#include "csio_mb.h"
#include "csio_defs.h"
int csio_intr_coalesce_cnt; /* value:SGE_INGRESS_RX_THRESHOLD[0] */
static int csio_sge_thresh_reg; /* SGE_INGRESS_RX_THRESHOLD[0] */
int csio_intr_coalesce_time = 10; /* value:SGE_TIMER_VALUE_1 */
static int csio_sge_timer_reg = 1;
#define CSIO_SET_FLBUF_SIZE(_hw, _reg, _val) \
csio_wr_reg32((_hw), (_val), SGE_FL_BUFFER_SIZE##_reg##_A)
static void
csio_get_flbuf_size(struct csio_hw *hw, struct csio_sge *sge, uint32_t reg)
{
sge->sge_fl_buf_size[reg] = csio_rd_reg32(hw, SGE_FL_BUFFER_SIZE0_A +
reg * sizeof(uint32_t));
}
/* Free list buffer size */
static inline uint32_t
csio_wr_fl_bufsz(struct csio_sge *sge, struct csio_dma_buf *buf)
{
return sge->sge_fl_buf_size[buf->paddr & 0xF];
}
/* Size of the egress queue status page */
static inline uint32_t
csio_wr_qstat_pgsz(struct csio_hw *hw)
{
return (hw->wrm.sge.sge_control & EGRSTATUSPAGESIZE_F) ? 128 : 64;
}
/* Ring freelist doorbell */
static inline void
csio_wr_ring_fldb(struct csio_hw *hw, struct csio_q *flq)
{
/*
* Ring the doorbell only when we have atleast CSIO_QCREDIT_SZ
* number of bytes in the freelist queue. This translates to atleast
* 8 freelist buffer pointers (since each pointer is 8 bytes).
*/
if (flq->inc_idx >= 8) {
csio_wr_reg32(hw, DBPRIO_F | QID_V(flq->un.fl.flid) |
PIDX_T5_V(flq->inc_idx / 8) | DBTYPE_F,
MYPF_REG(SGE_PF_KDOORBELL_A));
| 