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![Leon Romanovsky](/assets/img/avatar_default.png)
Commit f06267104d
("RDMA: Update workqueue usage") removed
content of qib_qsfp_deinit(...) and left it empty.
This patch deletes all leftovers of that function.
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
549 lines
14 KiB
C
549 lines
14 KiB
C
/*
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* Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved.
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* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/vmalloc.h>
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#include "qib.h"
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#include "qib_qsfp.h"
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/*
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* QSFP support for ib_qib driver, using "Two Wire Serial Interface" driver
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* in qib_twsi.c
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*/
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#define QSFP_MAX_RETRY 4
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static int qsfp_read(struct qib_pportdata *ppd, int addr, void *bp, int len)
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{
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struct qib_devdata *dd = ppd->dd;
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u32 out, mask;
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int ret, cnt, pass = 0;
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int stuck = 0;
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u8 *buff = bp;
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ret = mutex_lock_interruptible(&dd->eep_lock);
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if (ret)
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goto no_unlock;
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if (dd->twsi_eeprom_dev == QIB_TWSI_NO_DEV) {
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ret = -ENXIO;
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goto bail;
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}
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/*
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* We presume, if we are called at all, that this board has
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* QSFP. This is on the same i2c chain as the legacy parts,
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* but only responds if the module is selected via GPIO pins.
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* Further, there are very long setup and hold requirements
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* on MODSEL.
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*/
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mask = QSFP_GPIO_MOD_SEL_N | QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE;
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out = QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE;
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if (ppd->hw_pidx) {
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mask <<= QSFP_GPIO_PORT2_SHIFT;
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out <<= QSFP_GPIO_PORT2_SHIFT;
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}
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dd->f_gpio_mod(dd, out, mask, mask);
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/*
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* Module could take up to 2 Msec to respond to MOD_SEL, and there
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* is no way to tell if it is ready, so we must wait.
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*/
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msleep(20);
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/* Make sure TWSI bus is in sane state. */
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ret = qib_twsi_reset(dd);
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if (ret) {
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qib_dev_porterr(dd, ppd->port,
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"QSFP interface Reset for read failed\n");
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ret = -EIO;
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stuck = 1;
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goto deselect;
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}
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/* All QSFP modules are at A0 */
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cnt = 0;
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while (cnt < len) {
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unsigned in_page;
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int wlen = len - cnt;
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in_page = addr % QSFP_PAGESIZE;
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if ((in_page + wlen) > QSFP_PAGESIZE)
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wlen = QSFP_PAGESIZE - in_page;
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ret = qib_twsi_blk_rd(dd, QSFP_DEV, addr, buff + cnt, wlen);
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/* Some QSFP's fail first try. Retry as experiment */
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if (ret && cnt == 0 && ++pass < QSFP_MAX_RETRY)
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continue;
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if (ret) {
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/* qib_twsi_blk_rd() 1 for error, else 0 */
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ret = -EIO;
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goto deselect;
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}
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addr += wlen;
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cnt += wlen;
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}
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ret = cnt;
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deselect:
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/*
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* Module could take up to 10 uSec after transfer before
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* ready to respond to MOD_SEL negation, and there is no way
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* to tell if it is ready, so we must wait.
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*/
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udelay(10);
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/* set QSFP MODSEL, RST. LP all high */
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dd->f_gpio_mod(dd, mask, mask, mask);
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/*
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* Module could take up to 2 Msec to respond to MOD_SEL
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* going away, and there is no way to tell if it is ready.
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* so we must wait.
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*/
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if (stuck)
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qib_dev_err(dd, "QSFP interface bus stuck non-idle\n");
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if (pass >= QSFP_MAX_RETRY && ret)
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qib_dev_porterr(dd, ppd->port, "QSFP failed even retrying\n");
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else if (pass)
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qib_dev_porterr(dd, ppd->port, "QSFP retries: %d\n", pass);
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msleep(20);
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bail:
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mutex_unlock(&dd->eep_lock);
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no_unlock:
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return ret;
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}
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/*
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* qsfp_write
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* We do not ordinarily write the QSFP, but this is needed to select
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* the page on non-flat QSFPs, and possibly later unusual cases
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*/
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static int qib_qsfp_write(struct qib_pportdata *ppd, int addr, void *bp,
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int len)
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{
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struct qib_devdata *dd = ppd->dd;
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u32 out, mask;
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int ret, cnt;
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u8 *buff = bp;
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ret = mutex_lock_interruptible(&dd->eep_lock);
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if (ret)
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goto no_unlock;
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if (dd->twsi_eeprom_dev == QIB_TWSI_NO_DEV) {
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ret = -ENXIO;
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goto bail;
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}
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/*
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* We presume, if we are called at all, that this board has
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* QSFP. This is on the same i2c chain as the legacy parts,
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* but only responds if the module is selected via GPIO pins.
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* Further, there are very long setup and hold requirements
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* on MODSEL.
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*/
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mask = QSFP_GPIO_MOD_SEL_N | QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE;
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out = QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE;
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if (ppd->hw_pidx) {
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mask <<= QSFP_GPIO_PORT2_SHIFT;
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out <<= QSFP_GPIO_PORT2_SHIFT;
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}
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dd->f_gpio_mod(dd, out, mask, mask);
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/*
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* Module could take up to 2 Msec to respond to MOD_SEL,
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* and there is no way to tell if it is ready, so we must wait.
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*/
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msleep(20);
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/* Make sure TWSI bus is in sane state. */
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ret = qib_twsi_reset(dd);
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if (ret) {
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qib_dev_porterr(dd, ppd->port,
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"QSFP interface Reset for write failed\n");
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ret = -EIO;
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goto deselect;
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}
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/* All QSFP modules are at A0 */
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cnt = 0;
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while (cnt < len) {
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unsigned in_page;
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int wlen = len - cnt;
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in_page = addr % QSFP_PAGESIZE;
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if ((in_page + wlen) > QSFP_PAGESIZE)
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wlen = QSFP_PAGESIZE - in_page;
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ret = qib_twsi_blk_wr(dd, QSFP_DEV, addr, buff + cnt, wlen);
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if (ret) {
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/* qib_twsi_blk_wr() 1 for error, else 0 */
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ret = -EIO;
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goto deselect;
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}
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addr += wlen;
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cnt += wlen;
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}
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ret = cnt;
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deselect:
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/*
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* Module could take up to 10 uSec after transfer before
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* ready to respond to MOD_SEL negation, and there is no way
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* to tell if it is ready, so we must wait.
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*/
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udelay(10);
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/* set QSFP MODSEL, RST, LP high */
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dd->f_gpio_mod(dd, mask, mask, mask);
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/*
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* Module could take up to 2 Msec to respond to MOD_SEL
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* going away, and there is no way to tell if it is ready.
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* so we must wait.
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*/
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msleep(20);
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bail:
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mutex_unlock(&dd->eep_lock);
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no_unlock:
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return ret;
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}
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/*
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* For validation, we want to check the checksums, even of the
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* fields we do not otherwise use. This function reads the bytes from
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* <first> to <next-1> and returns the 8lsbs of the sum, or <0 for errors
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*/
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static int qsfp_cks(struct qib_pportdata *ppd, int first, int next)
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{
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int ret;
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u16 cks;
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u8 bval;
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cks = 0;
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while (first < next) {
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ret = qsfp_read(ppd, first, &bval, 1);
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if (ret < 0)
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goto bail;
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cks += bval;
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++first;
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}
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ret = cks & 0xFF;
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bail:
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return ret;
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}
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int qib_refresh_qsfp_cache(struct qib_pportdata *ppd, struct qib_qsfp_cache *cp)
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{
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int ret;
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int idx;
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u16 cks;
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u8 peek[4];
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/* ensure sane contents on invalid reads, for cable swaps */
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memset(cp, 0, sizeof(*cp));
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if (!qib_qsfp_mod_present(ppd)) {
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ret = -ENODEV;
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goto bail;
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}
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ret = qsfp_read(ppd, 0, peek, 3);
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if (ret < 0)
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goto bail;
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if ((peek[0] & 0xFE) != 0x0C)
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qib_dev_porterr(ppd->dd, ppd->port,
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"QSFP byte0 is 0x%02X, S/B 0x0C/D\n", peek[0]);
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if ((peek[2] & 4) == 0) {
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/*
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* If cable is paged, rather than "flat memory", we need to
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* set the page to zero, Even if it already appears to be zero.
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*/
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u8 poke = 0;
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ret = qib_qsfp_write(ppd, 127, &poke, 1);
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udelay(50);
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if (ret != 1) {
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qib_dev_porterr(ppd->dd, ppd->port,
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"Failed QSFP Page set\n");
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goto bail;
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}
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}
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ret = qsfp_read(ppd, QSFP_MOD_ID_OFFS, &cp->id, 1);
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if (ret < 0)
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goto bail;
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if ((cp->id & 0xFE) != 0x0C)
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qib_dev_porterr(ppd->dd, ppd->port,
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"QSFP ID byte is 0x%02X, S/B 0x0C/D\n", cp->id);
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cks = cp->id;
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ret = qsfp_read(ppd, QSFP_MOD_PWR_OFFS, &cp->pwr, 1);
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if (ret < 0)
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goto bail;
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cks += cp->pwr;
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ret = qsfp_cks(ppd, QSFP_MOD_PWR_OFFS + 1, QSFP_MOD_LEN_OFFS);
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if (ret < 0)
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goto bail;
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cks += ret;
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ret = qsfp_read(ppd, QSFP_MOD_LEN_OFFS, &cp->len, 1);
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if (ret < 0)
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goto bail;
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cks += cp->len;
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ret = qsfp_read(ppd, QSFP_MOD_TECH_OFFS, &cp->tech, 1);
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if (ret < 0)
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goto bail;
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cks += cp->tech;
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ret = qsfp_read(ppd, QSFP_VEND_OFFS, &cp->vendor, QSFP_VEND_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_VEND_LEN; ++idx)
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cks += cp->vendor[idx];
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ret = qsfp_read(ppd, QSFP_IBXCV_OFFS, &cp->xt_xcv, 1);
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if (ret < 0)
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goto bail;
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cks += cp->xt_xcv;
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ret = qsfp_read(ppd, QSFP_VOUI_OFFS, &cp->oui, QSFP_VOUI_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_VOUI_LEN; ++idx)
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cks += cp->oui[idx];
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ret = qsfp_read(ppd, QSFP_PN_OFFS, &cp->partnum, QSFP_PN_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_PN_LEN; ++idx)
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cks += cp->partnum[idx];
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ret = qsfp_read(ppd, QSFP_REV_OFFS, &cp->rev, QSFP_REV_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_REV_LEN; ++idx)
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cks += cp->rev[idx];
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ret = qsfp_read(ppd, QSFP_ATTEN_OFFS, &cp->atten, QSFP_ATTEN_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_ATTEN_LEN; ++idx)
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cks += cp->atten[idx];
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ret = qsfp_cks(ppd, QSFP_ATTEN_OFFS + QSFP_ATTEN_LEN, QSFP_CC_OFFS);
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if (ret < 0)
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goto bail;
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cks += ret;
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cks &= 0xFF;
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ret = qsfp_read(ppd, QSFP_CC_OFFS, &cp->cks1, 1);
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if (ret < 0)
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goto bail;
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if (cks != cp->cks1)
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qib_dev_porterr(ppd->dd, ppd->port,
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"QSFP cks1 is %02X, computed %02X\n", cp->cks1,
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cks);
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/* Second checksum covers 192 to (serial, date, lot) */
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ret = qsfp_cks(ppd, QSFP_CC_OFFS + 1, QSFP_SN_OFFS);
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if (ret < 0)
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goto bail;
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cks = ret;
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ret = qsfp_read(ppd, QSFP_SN_OFFS, &cp->serial, QSFP_SN_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_SN_LEN; ++idx)
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cks += cp->serial[idx];
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ret = qsfp_read(ppd, QSFP_DATE_OFFS, &cp->date, QSFP_DATE_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_DATE_LEN; ++idx)
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cks += cp->date[idx];
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ret = qsfp_read(ppd, QSFP_LOT_OFFS, &cp->lot, QSFP_LOT_LEN);
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if (ret < 0)
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goto bail;
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for (idx = 0; idx < QSFP_LOT_LEN; ++idx)
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cks += cp->lot[idx];
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ret = qsfp_cks(ppd, QSFP_LOT_OFFS + QSFP_LOT_LEN, QSFP_CC_EXT_OFFS);
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if (ret < 0)
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goto bail;
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cks += ret;
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ret = qsfp_read(ppd, QSFP_CC_EXT_OFFS, &cp->cks2, 1);
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if (ret < 0)
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goto bail;
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cks &= 0xFF;
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if (cks != cp->cks2)
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qib_dev_porterr(ppd->dd, ppd->port,
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"QSFP cks2 is %02X, computed %02X\n", cp->cks2,
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cks);
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return 0;
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bail:
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cp->id = 0;
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return ret;
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}
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const char * const qib_qsfp_devtech[16] = {
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"850nm VCSEL", "1310nm VCSEL", "1550nm VCSEL", "1310nm FP",
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"1310nm DFB", "1550nm DFB", "1310nm EML", "1550nm EML",
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"Cu Misc", "1490nm DFB", "Cu NoEq", "Cu Eq",
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"Undef", "Cu Active BothEq", "Cu FarEq", "Cu NearEq"
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};
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#define QSFP_DUMP_CHUNK 16 /* Holds longest string */
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#define QSFP_DEFAULT_HDR_CNT 224
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static const char *pwr_codes = "1.5W2.0W2.5W3.5W";
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int qib_qsfp_mod_present(struct qib_pportdata *ppd)
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{
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u32 mask;
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int ret;
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mask = QSFP_GPIO_MOD_PRS_N <<
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(ppd->hw_pidx * QSFP_GPIO_PORT2_SHIFT);
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ret = ppd->dd->f_gpio_mod(ppd->dd, 0, 0, 0);
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return !((ret & mask) >>
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((ppd->hw_pidx * QSFP_GPIO_PORT2_SHIFT) + 3));
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}
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/*
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* Initialize structures that control access to QSFP. Called once per port
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* on cards that support QSFP.
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*/
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void qib_qsfp_init(struct qib_qsfp_data *qd,
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void (*fevent)(struct work_struct *))
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{
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u32 mask, highs;
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struct qib_devdata *dd = qd->ppd->dd;
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/* Initialize work struct for later QSFP events */
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INIT_WORK(&qd->work, fevent);
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/*
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* Later, we may want more validation. For now, just set up pins and
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* blip reset. If module is present, call qib_refresh_qsfp_cache(),
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* to do further init.
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*/
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mask = QSFP_GPIO_MOD_SEL_N | QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE;
|
|
highs = mask - QSFP_GPIO_MOD_RST_N;
|
|
if (qd->ppd->hw_pidx) {
|
|
mask <<= QSFP_GPIO_PORT2_SHIFT;
|
|
highs <<= QSFP_GPIO_PORT2_SHIFT;
|
|
}
|
|
dd->f_gpio_mod(dd, highs, mask, mask);
|
|
udelay(20); /* Generous RST dwell */
|
|
|
|
dd->f_gpio_mod(dd, mask, mask, mask);
|
|
}
|
|
|
|
int qib_qsfp_dump(struct qib_pportdata *ppd, char *buf, int len)
|
|
{
|
|
struct qib_qsfp_cache cd;
|
|
u8 bin_buff[QSFP_DUMP_CHUNK];
|
|
char lenstr[6];
|
|
int sofar, ret;
|
|
int bidx = 0;
|
|
|
|
sofar = 0;
|
|
ret = qib_refresh_qsfp_cache(ppd, &cd);
|
|
if (ret < 0)
|
|
goto bail;
|
|
|
|
lenstr[0] = ' ';
|
|
lenstr[1] = '\0';
|
|
if (QSFP_IS_CU(cd.tech))
|
|
sprintf(lenstr, "%dM ", cd.len);
|
|
|
|
sofar += scnprintf(buf + sofar, len - sofar, "PWR:%.3sW\n", pwr_codes +
|
|
(QSFP_PWR(cd.pwr) * 4));
|
|
|
|
sofar += scnprintf(buf + sofar, len - sofar, "TECH:%s%s\n", lenstr,
|
|
qib_qsfp_devtech[cd.tech >> 4]);
|
|
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Vendor:%.*s\n",
|
|
QSFP_VEND_LEN, cd.vendor);
|
|
|
|
sofar += scnprintf(buf + sofar, len - sofar, "OUI:%06X\n",
|
|
QSFP_OUI(cd.oui));
|
|
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Part#:%.*s\n",
|
|
QSFP_PN_LEN, cd.partnum);
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Rev:%.*s\n",
|
|
QSFP_REV_LEN, cd.rev);
|
|
if (QSFP_IS_CU(cd.tech))
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Atten:%d, %d\n",
|
|
QSFP_ATTEN_SDR(cd.atten),
|
|
QSFP_ATTEN_DDR(cd.atten));
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Serial:%.*s\n",
|
|
QSFP_SN_LEN, cd.serial);
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Date:%.*s\n",
|
|
QSFP_DATE_LEN, cd.date);
|
|
sofar += scnprintf(buf + sofar, len - sofar, "Lot:%.*s\n",
|
|
QSFP_LOT_LEN, cd.lot);
|
|
|
|
while (bidx < QSFP_DEFAULT_HDR_CNT) {
|
|
int iidx;
|
|
|
|
ret = qsfp_read(ppd, bidx, bin_buff, QSFP_DUMP_CHUNK);
|
|
if (ret < 0)
|
|
goto bail;
|
|
for (iidx = 0; iidx < ret; ++iidx) {
|
|
sofar += scnprintf(buf + sofar, len-sofar, " %02X",
|
|
bin_buff[iidx]);
|
|
}
|
|
sofar += scnprintf(buf + sofar, len - sofar, "\n");
|
|
bidx += QSFP_DUMP_CHUNK;
|
|
}
|
|
ret = sofar;
|
|
bail:
|
|
return ret;
|
|
}
|