diff options
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_qsfp.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_qsfp.c | 549 |
1 files changed, 0 insertions, 549 deletions
diff --git a/drivers/infiniband/hw/qib/qib_qsfp.c b/drivers/infiniband/hw/qib/qib_qsfp.c deleted file mode 100644 index 295d40a83bb6..000000000000 --- a/drivers/infiniband/hw/qib/qib_qsfp.c +++ /dev/null @@ -1,549 +0,0 @@ -/* - * Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved. - * Copyright (c) 2003, 2004, 2005, 2006 PathScale, 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/delay.h> -#include <linux/pci.h> -#include <linux/vmalloc.h> - -#include "qib.h" -#include "qib_qsfp.h" - -/* - * QSFP support for ib_qib driver, using "Two Wire Serial Interface" driver - * in qib_twsi.c - */ -#define QSFP_MAX_RETRY 4 - -static int qsfp_read(struct qib_pportdata *ppd, int addr, void *bp, int len) -{ - struct qib_devdata *dd = ppd->dd; - u32 out, mask; - int ret, cnt, pass = 0; - int stuck = 0; - u8 *buff = bp; - - ret = mutex_lock_interruptible(&dd->eep_lock); - if (ret) - goto no_unlock; - - if (dd->twsi_eeprom_dev == QIB_TWSI_NO_DEV) { - ret = -ENXIO; - goto bail; - } - - /* - * We presume, if we are called at all, that this board has - * QSFP. This is on the same i2c chain as the legacy parts, - * but only responds if the module is selected via GPIO pins. - * Further, there are very long setup and hold requirements - * on MODSEL. - */ - mask = QSFP_GPIO_MOD_SEL_N | QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE; - out = QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE; - if (ppd->hw_pidx) { - mask <<= QSFP_GPIO_PORT2_SHIFT; - out <<= QSFP_GPIO_PORT2_SHIFT; - } - - dd->f_gpio_mod(dd, out, mask, mask); - - /* - * Module could take up to 2 Msec to respond to MOD_SEL, and there - * is no way to tell if it is ready, so we must wait. - */ - msleep(20); - - /* Make sure TWSI bus is in sane state. */ - ret = qib_twsi_reset(dd); - if (ret) { - qib_dev_porterr(dd, ppd->port, - "QSFP interface Reset for read failed\n"); - ret = -EIO; - stuck = 1; - goto deselect; - } - - /* All QSFP modules are at A0 */ - - cnt = 0; - while (cnt < len) { - unsigned in_page; - int wlen = len - cnt; - - in_page = addr % QSFP_PAGESIZE; - if ((in_page + wlen) > QSFP_PAGESIZE) - wlen = QSFP_PAGESIZE - in_page; - ret = qib_twsi_blk_rd(dd, QSFP_DEV, addr, buff + cnt, wlen); - /* Some QSFP's fail first try. Retry as experiment */ - if (ret && cnt == 0 && ++pass < QSFP_MAX_RETRY) - continue; - if (ret) { - /* qib_twsi_blk_rd() 1 for error, else 0 */ - ret = -EIO; - goto deselect; - } - addr += wlen; - cnt += wlen; - } - ret = cnt; - -deselect: - /* - * Module could take up to 10 uSec after transfer before - * ready to respond to MOD_SEL negation, and there is no way - * to tell if it is ready, so we must wait. - */ - udelay(10); - /* set QSFP MODSEL, RST. LP all high */ - dd->f_gpio_mod(dd, mask, mask, mask); - - /* - * Module could take up to 2 Msec to respond to MOD_SEL - * going away, and there is no way to tell if it is ready. - * so we must wait. - */ - if (stuck) - qib_dev_err(dd, "QSFP interface bus stuck non-idle\n"); - - if (pass >= QSFP_MAX_RETRY && ret) - qib_dev_porterr(dd, ppd->port, "QSFP failed even retrying\n"); - else if (pass) - qib_dev_porterr(dd, ppd->port, "QSFP retries: %d\n", pass); - - msleep(20); - -bail: - mutex_unlock(&dd->eep_lock); - -no_unlock: - return ret; -} - -/* - * qsfp_write - * We do not ordinarily write the QSFP, but this is needed to select - * the page on non-flat QSFPs, and possibly later unusual cases - */ -static int qib_qsfp_write(struct qib_pportdata *ppd, int addr, void *bp, - int len) -{ - struct qib_devdata *dd = ppd->dd; - u32 out, mask; - int ret, cnt; - u8 *buff = bp; - - ret = mutex_lock_interruptible(&dd->eep_lock); - if (ret) - goto no_unlock; - - if (dd->twsi_eeprom_dev == QIB_TWSI_NO_DEV) { - ret = -ENXIO; - goto bail; - } - - /* - * We presume, if we are called at all, that this board has - * QSFP. This is on the same i2c chain as the legacy parts, - * but only responds if the module is selected via GPIO pins. - * Further, there are very long setup and hold requirements - * on MODSEL. - */ - mask = QSFP_GPIO_MOD_SEL_N | QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE; - out = QSFP_GPIO_MOD_RST_N | QSFP_GPIO_LP_MODE; - if (ppd->hw_pidx) { - mask <<= QSFP_GPIO_PORT2_SHIFT; - out <<= QSFP_GPIO_PORT2_SHIFT; - } - dd->f_gpio_mod(dd, out, mask, mask); - - /* - * Module could take up to 2 Msec to respond to MOD_SEL, - * and there is no way to tell if it is ready, so we must wait. - */ - msleep(20); - - /* Make sure TWSI bus is in sane state. */ - ret = qib_twsi_reset(dd); - if (ret) { - qib_dev_porterr(dd, ppd->port, - "QSFP interface Reset for write failed\n"); - ret = -EIO; - goto deselect; - } - - /* All QSFP modules are at A0 */ - - cnt = 0; - while (cnt < len) { - unsigned in_page; - int wlen = len - cnt; - - in_page = addr % QSFP_PAGESIZE; - if ((in_page + wlen) > QSFP_PAGESIZE) - wlen = QSFP_PAGESIZE - in_page; - ret = qib_twsi_blk_wr(dd, QSFP_DEV, addr, buff + cnt, wlen); - if (ret) { - /* qib_twsi_blk_wr() 1 for error, else 0 */ - ret = -EIO; - goto deselect; - } - addr += wlen; - cnt += wlen; - } - ret = cnt; - -deselect: - /* - * Module could take up to 10 uSec after transfer before - * ready to respond to MOD_SEL negation, and there is no way - * to tell if it is ready, so we must wait. - */ - udelay(10); - /* set QSFP MODSEL, RST, LP high */ - dd->f_gpio_mod(dd, mask, mask, mask); - /* - * Module could take up to 2 Msec to respond to MOD_SEL - * going away, and there is no way to tell if it is ready. - * so we must wait. - */ - msleep(20); - -bail: - mutex_unlock(&dd->eep_lock); - -no_unlock: - return ret; -} - -/* - * For validation, we want to check the checksums, even of the - * fields we do not otherwise use. This function reads the bytes from - * <first> to <next-1> and returns the 8lsbs of the sum, or <0 for errors - */ -static int qsfp_cks(struct qib_pportdata *ppd, int first, int next) -{ - int ret; - u16 cks; - u8 bval; - - cks = 0; - while (first < next) { - ret = qsfp_read(ppd, first, &bval, 1); - if (ret < 0) - goto bail; - cks += bval; - ++first; - } - ret = cks & 0xFF; -bail: - return ret; - -} - -int qib_refresh_qsfp_cache(struct qib_pportdata *ppd, struct qib_qsfp_cache *cp) -{ - int ret; - int idx; - u16 cks; - u8 peek[4]; - - /* ensure sane contents on invalid reads, for cable swaps */ - memset(cp, 0, sizeof(*cp)); - - if (!qib_qsfp_mod_present(ppd)) { - ret = -ENODEV; - goto bail; - } - - ret = qsfp_read(ppd, 0, peek, 3); - if (ret < 0) - goto bail; - if ((peek[0] & 0xFE) != 0x0C) - qib_dev_porterr(ppd->dd, ppd->port, - "QSFP byte0 is 0x%02X, S/B 0x0C/D\n", peek[0]); - - if ((peek[2] & 4) == 0) { - /* - * If cable is paged, rather than "flat memory", we need to - * set the page to zero, Even if it already appears to be zero. - */ - u8 poke = 0; - - ret = qib_qsfp_write(ppd, 127, &poke, 1); - udelay(50); - if (ret != 1) { - qib_dev_porterr(ppd->dd, ppd->port, - "Failed QSFP Page set\n"); - goto bail; - } - } - - ret = qsfp_read(ppd, QSFP_MOD_ID_OFFS, &cp->id, 1); - if (ret < 0) - goto bail; - if ((cp->id & 0xFE) != 0x0C) - qib_dev_porterr(ppd->dd, ppd->port, - "QSFP ID byte is 0x%02X, S/B 0x0C/D\n", cp->id); - cks = cp->id; - - ret = qsfp_read(ppd, QSFP_MOD_PWR_OFFS, &cp->pwr, 1); - if (ret < 0) - goto bail; - cks += cp->pwr; - - ret = qsfp_cks(ppd, QSFP_MOD_PWR_OFFS + 1, QSFP_MOD_LEN_OFFS); - if (ret < 0) - goto bail; - cks += ret; - - ret = qsfp_read(ppd, QSFP_MOD_LEN_OFFS, &cp->len, 1); - if (ret < 0) - goto bail; - cks += cp->len; - - ret = qsfp_read(ppd, QSFP_MOD_TECH_OFFS, &cp->tech, 1); - if (ret < 0) - goto bail; - cks += cp->tech; - - ret = qsfp_read(ppd, QSFP_VEND_OFFS, &cp->vendor, QSFP_VEND_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_VEND_LEN; ++idx) - cks += cp->vendor[idx]; - - ret = qsfp_read(ppd, QSFP_IBXCV_OFFS, &cp->xt_xcv, 1); - if (ret < 0) - goto bail; - cks += cp->xt_xcv; - - ret = qsfp_read(ppd, QSFP_VOUI_OFFS, &cp->oui, QSFP_VOUI_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_VOUI_LEN; ++idx) - cks += cp->oui[idx]; - - ret = qsfp_read(ppd, QSFP_PN_OFFS, &cp->partnum, QSFP_PN_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_PN_LEN; ++idx) - cks += cp->partnum[idx]; - - ret = qsfp_read(ppd, QSFP_REV_OFFS, &cp->rev, QSFP_REV_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_REV_LEN; ++idx) - cks += cp->rev[idx]; - - ret = qsfp_read(ppd, QSFP_ATTEN_OFFS, &cp->atten, QSFP_ATTEN_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_ATTEN_LEN; ++idx) - cks += cp->atten[idx]; - - ret = qsfp_cks(ppd, QSFP_ATTEN_OFFS + QSFP_ATTEN_LEN, QSFP_CC_OFFS); - if (ret < 0) - goto bail; - cks += ret; - - cks &= 0xFF; - ret = qsfp_read(ppd, QSFP_CC_OFFS, &cp->cks1, 1); - if (ret < 0) - goto bail; - if (cks != cp->cks1) - qib_dev_porterr(ppd->dd, ppd->port, - "QSFP cks1 is %02X, computed %02X\n", cp->cks1, - cks); - - /* Second checksum covers 192 to (serial, date, lot) */ - ret = qsfp_cks(ppd, QSFP_CC_OFFS + 1, QSFP_SN_OFFS); - if (ret < 0) - goto bail; - cks = ret; - - ret = qsfp_read(ppd, QSFP_SN_OFFS, &cp->serial, QSFP_SN_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_SN_LEN; ++idx) - cks += cp->serial[idx]; - - ret = qsfp_read(ppd, QSFP_DATE_OFFS, &cp->date, QSFP_DATE_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_DATE_LEN; ++idx) - cks += cp->date[idx]; - - ret = qsfp_read(ppd, QSFP_LOT_OFFS, &cp->lot, QSFP_LOT_LEN); - if (ret < 0) - goto bail; - for (idx = 0; idx < QSFP_LOT_LEN; ++idx) - cks += cp->lot[idx]; - - ret = qsfp_cks(ppd, QSFP_LOT_OFFS + QSFP_LOT_LEN, QSFP_CC_EXT_OFFS); - if (ret < 0) - goto bail; - cks += ret; - - ret = qsfp_read(ppd, QSFP_CC_EXT_OFFS, &cp->cks2, 1); - if (ret < 0) - goto bail; - cks &= 0xFF; - if (cks != cp->cks2) - qib_dev_porterr(ppd->dd, ppd->port, - "QSFP cks2 is %02X, computed %02X\n", cp->cks2, - cks); - return 0; - -bail: - cp->id = 0; - return ret; -} - -const char * const qib_qsfp_devtech[16] = { - "850nm VCSEL", "1310nm VCSEL", "1550nm VCSEL", "1310nm FP", - "1310nm DFB", "1550nm DFB", "1310nm EML", "1550nm EML", - "Cu Misc", "1490nm DFB", "Cu NoEq", "Cu Eq", - "Undef", "Cu Active BothEq", "Cu FarEq", "Cu NearEq" -}; - -#define QSFP_DUMP_CHUNK 16 /* Holds longest string */ -#define QSFP_DEFAULT_HDR_CNT 224 - -static const char *pwr_codes = "1.5W2.0W2.5W3.5W"; - -int qib_qsfp_mod_present(struct qib_pportdata *ppd) -{ - u32 mask; - int ret; - - mask = QSFP_GPIO_MOD_PRS_N << - (ppd->hw_pidx * QSFP_GPIO_PORT2_SHIFT); - ret = ppd->dd->f_gpio_mod(ppd->dd, 0, 0, 0); - - return !((ret & mask) >> - ((ppd->hw_pidx * QSFP_GPIO_PORT2_SHIFT) + 3)); -} - -/* - * Initialize structures that control access to QSFP. Called once per port - * on cards that support QSFP. - */ -void qib_qsfp_init(struct qib_qsfp_data *qd, - void (*fevent)(struct work_struct *)) -{ - u32 mask, highs; - - struct qib_devdata *dd = qd->ppd->dd; - - /* Initialize work struct for later QSFP events */ - INIT_WORK(&qd->work, fevent); - - /* - * Later, we may want more validation. For now, just set up pins and - * blip reset. If module is present, call qib_refresh_qsfp_cache(), - * to do further init. - */ - 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; -} |