Linux-libre 4.7.1-gnupck-4.7.1-gnu

1 files changed, 0 insertions, 606 deletions

diff --git a/drivers/staging/rdma/hfi1/qsfp.c b/drivers/staging/rdma/hfi1/qsfp.c
deleted file mode 100644
index 9ed196301..000000000
--- a/drivers/staging/rdma/hfi1/qsfp.c
+++ /dev/null
@@ -1,606 +0,0 @@
-/*
- * Copyright(c) 2015, 2016 Intel Corporation.
- *
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * 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.
- *  - Neither the name of Intel Corporation nor the names of its
- *    contributors may be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/vmalloc.h>
-
-#include "hfi.h"
-#include "twsi.h"
-
-/*
- * QSFP support for hfi driver, using "Two Wire Serial Interface" driver
- * in twsi.c
- */
-#define I2C_MAX_RETRY 4
-
-/*
- * Raw i2c write.  No set-up or lock checking.
- */
-static int __i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
-		       int offset, void *bp, int len)
-{
-	struct hfi1_devdata *dd = ppd->dd;
-	int ret, cnt;
-	u8 *buff = bp;
-
-	cnt = 0;
-	while (cnt < len) {
-		int wlen = len - cnt;
-
-		ret = hfi1_twsi_blk_wr(dd, target, i2c_addr, offset,
-				       buff + cnt, wlen);
-		if (ret) {
-			/* hfi1_twsi_blk_wr() 1 for error, else 0 */
-			return -EIO;
-		}
-		offset += wlen;
-		cnt += wlen;
-	}
-
-	/* Must wait min 20us between qsfp i2c transactions */
-	udelay(20);
-
-	return cnt;
-}
-
-/*
- * Caller must hold the i2c chain resource.
- */
-int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr, int offset,
-	      void *bp, int len)
-{
-	int ret;
-
-	if (!check_chip_resource(ppd->dd, qsfp_resource(ppd->dd), __func__))
-		return -EACCES;
-
-	/* make sure the TWSI bus is in a sane state */
-	ret = hfi1_twsi_reset(ppd->dd, target);
-	if (ret) {
-		hfi1_dev_porterr(ppd->dd, ppd->port,
-				 "I2C chain %d write interface reset failed\n",
-				 target);
-		return ret;
-	}
-
-	return __i2c_write(ppd, target, i2c_addr, offset, bp, len);
-}
-
-/*
- * Raw i2c read.  No set-up or lock checking.
- */
-static int __i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
-		      int offset, void *bp, int len)
-{
-	struct hfi1_devdata *dd = ppd->dd;
-	int ret, cnt, pass = 0;
-	int orig_offset = offset;
-
-	cnt = 0;
-	while (cnt < len) {
-		int rlen = len - cnt;
-
-		ret = hfi1_twsi_blk_rd(dd, target, i2c_addr, offset,
-				       bp + cnt, rlen);
-		/* Some QSFP's fail first try. Retry as experiment */
-		if (ret && cnt == 0 && ++pass < I2C_MAX_RETRY)
-			continue;
-		if (ret) {
-			/* hfi1_twsi_blk_rd() 1 for error, else 0 */
-			ret = -EIO;
-			goto exit;
-		}
-		offset += rlen;
-		cnt += rlen;
-	}
-
-	ret = cnt;
-
-exit:
-	if (ret < 0) {
-		hfi1_dev_porterr(dd, ppd->port,
-				 "I2C chain %d read failed, addr 0x%x, offset 0x%x, len %d\n",
-				 target, i2c_addr, orig_offset, len);
-	}
-
-	/* Must wait min 20us between qsfp i2c transactions */
-	udelay(20);
-
-	return ret;
-}
-
-/*
- * Caller must hold the i2c chain resource.
- */
-int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr, int offset,
-	     void *bp, int len)
-{
-	int ret;
-
-	if (!check_chip_resource(ppd->dd, qsfp_resource(ppd->dd), __func__))
-		return -EACCES;
-
-	/* make sure the TWSI bus is in a sane state */
-	ret = hfi1_twsi_reset(ppd->dd, target);
-	if (ret) {
-		hfi1_dev_porterr(ppd->dd, ppd->port,
-				 "I2C chain %d read interface reset failed\n",
-				 target);
-		return ret;
-	}
-
-	return __i2c_read(ppd, target, i2c_addr, offset, bp, len);
-}
-
-/*
- * Write page n, offset m of QSFP memory as defined by SFF 8636
- * by writing @addr = ((256 * n) + m)
- *
- * Caller must hold the i2c chain resource.
- */
-int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
-	       int len)
-{
-	int count = 0;
-	int offset;
-	int nwrite;
-	int ret;
-	u8 page;
-
-	if (!check_chip_resource(ppd->dd, qsfp_resource(ppd->dd), __func__))
-		return -EACCES;
-
-	/* make sure the TWSI bus is in a sane state */
-	ret = hfi1_twsi_reset(ppd->dd, target);
-	if (ret) {
-		hfi1_dev_porterr(ppd->dd, ppd->port,
-				 "QSFP chain %d write interface reset failed\n",
-				 target);
-		return ret;
-	}
-
-	while (count < len) {
-		/*
-		 * Set the qsfp page based on a zero-based address
-		 * and a page size of QSFP_PAGESIZE bytes.
-		 */
-		page = (u8)(addr / QSFP_PAGESIZE);
-
-		ret = __i2c_write(ppd, target, QSFP_DEV | QSFP_OFFSET_SIZE,
-				  QSFP_PAGE_SELECT_BYTE_OFFS, &page, 1);
-		if (ret != 1) {
-			hfi1_dev_porterr(ppd->dd, ppd->port,
-					 "QSFP chain %d can't write QSFP_PAGE_SELECT_BYTE: %d\n",
-					 target, ret);
-			ret = -EIO;
-			break;
-		}
-
-		offset = addr % QSFP_PAGESIZE;
-		nwrite = len - count;
-		/* truncate write to boundary if crossing boundary */
-		if (((addr % QSFP_RW_BOUNDARY) + nwrite) > QSFP_RW_BOUNDARY)
-			nwrite = QSFP_RW_BOUNDARY - (addr % QSFP_RW_BOUNDARY);
-
-		ret = __i2c_write(ppd, target, QSFP_DEV | QSFP_OFFSET_SIZE,
-				  offset, bp + count, nwrite);
-		if (ret <= 0)	/* stop on error or nothing written */
-			break;
-
-		count += ret;
-		addr += ret;
-	}
-
-	if (ret < 0)
-		return ret;
-	return count;
-}
-
-/*
- * Perform a stand-alone single QSFP write.  Acquire the resource, do the
- * read, then release the resource.
- */
-int one_qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
-		   int len)
-{
-	struct hfi1_devdata *dd = ppd->dd;
-	u32 resource = qsfp_resource(dd);
-	int ret;
-
-	ret = acquire_chip_resource(dd, resource, QSFP_WAIT);
-	if (ret)
-		return ret;
-	ret = qsfp_write(ppd, target, addr, bp, len);
-	release_chip_resource(dd, resource);
-
-	return ret;
-}
-
-/*
- * Access page n, offset m of QSFP memory as defined by SFF 8636
- * by reading @addr = ((256 * n) + m)
- *
- * Caller must hold the i2c chain resource.
- */
-int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
-	      int len)
-{
-	int count = 0;
-	int offset;
-	int nread;
-	int ret;
-	u8 page;
-
-	if (!check_chip_resource(ppd->dd, qsfp_resource(ppd->dd), __func__))
-		return -EACCES;
-
-	/* make sure the TWSI bus is in a sane state */
-	ret = hfi1_twsi_reset(ppd->dd, target);
-	if (ret) {
-		hfi1_dev_porterr(ppd->dd, ppd->port,
-				 "QSFP chain %d read interface reset failed\n",
-				 target);
-		return ret;
-	}
-
-	while (count < len) {
-		/*
-		 * Set the qsfp page based on a zero-based address
-		 * and a page size of QSFP_PAGESIZE bytes.
-		 */
-		page = (u8)(addr / QSFP_PAGESIZE);
-		ret = __i2c_write(ppd, target, QSFP_DEV | QSFP_OFFSET_SIZE,
-				  QSFP_PAGE_SELECT_BYTE_OFFS, &page, 1);
-		if (ret != 1) {
-			hfi1_dev_porterr(ppd->dd, ppd->port,
-					 "QSFP chain %d can't write QSFP_PAGE_SELECT_BYTE: %d\n",
-					 target, ret);
-			ret = -EIO;
-			break;
-		}
-
-		offset = addr % QSFP_PAGESIZE;
-		nread = len - count;
-		/* truncate read to boundary if crossing boundary */
-		if (((addr % QSFP_RW_BOUNDARY) + nread) > QSFP_RW_BOUNDARY)
-			nread = QSFP_RW_BOUNDARY - (addr % QSFP_RW_BOUNDARY);
-
-		/* QSFPs require a 5-10msec delay after write operations */
-		mdelay(5);
-		ret = __i2c_read(ppd, target, QSFP_DEV | QSFP_OFFSET_SIZE,
-				 offset, bp + count, nread);
-		if (ret <= 0)	/* stop on error or nothing read */
-			break;
-
-		count += ret;
-		addr += ret;
-	}
-
-	if (ret < 0)
-		return ret;
-	return count;
-}
-
-/*
- * Perform a stand-alone single QSFP read.  Acquire the resource, do the
- * read, then release the resource.
- */
-int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
-		  int len)
-{
-	struct hfi1_devdata *dd = ppd->dd;
-	u32 resource = qsfp_resource(dd);
-	int ret;
-
-	ret = acquire_chip_resource(dd, resource, QSFP_WAIT);
-	if (ret)
-		return ret;
-	ret = qsfp_read(ppd, target, addr, bp, len);
-	release_chip_resource(dd, resource);
-
-	return ret;
-}
-
-/*
- * This function caches the QSFP memory range in 128 byte chunks.
- * As an example, the next byte after address 255 is byte 128 from
- * upper page 01H (if existing) rather than byte 0 from lower page 00H.
- * Access page n, offset m of QSFP memory as defined by SFF 8636
- * in the cache by reading byte ((128 * n) + m)
- * The calls to qsfp_{read,write} in this function correctly handle the
- * address map difference between this mapping and the mapping implemented
- * by those functions
- */
-int refresh_qsfp_cache(struct hfi1_pportdata *ppd, struct qsfp_data *cp)
-{
-	u32 target = ppd->dd->hfi1_id;
-	int ret;
-	unsigned long flags;
-	u8 *cache = &cp->cache[0];
-
-	/* ensure sane contents on invalid reads, for cable swaps */
-	memset(cache, 0, (QSFP_MAX_NUM_PAGES * 128));
-	spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
-	ppd->qsfp_info.cache_valid = 0;
-	spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock, flags);
-
-	if (!qsfp_mod_present(ppd)) {
-		ret = -ENODEV;
-		goto bail_no_release;
-	}
-
-	ret = acquire_chip_resource(ppd->dd, qsfp_resource(ppd->dd), QSFP_WAIT);
-	if (ret)
-		goto bail_no_release;
-
-	ret = qsfp_read(ppd, target, 0, cache, QSFP_PAGESIZE);
-	if (ret != QSFP_PAGESIZE) {
-		dd_dev_info(ppd->dd,
-			    "%s: Page 0 read failed, expected %d, got %d\n",
-			    __func__, QSFP_PAGESIZE, ret);
-		goto bail;
-	}
-
-	/* Is paging enabled? */
-	if (!(cache[2] & 4)) {
-		/* Paging enabled, page 03 required */
-		if ((cache[195] & 0xC0) == 0xC0) {
-			/* all */
-			ret = qsfp_read(ppd, target, 384, cache + 256, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-			ret = qsfp_read(ppd, target, 640, cache + 384, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-			ret = qsfp_read(ppd, target, 896, cache + 512, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-		} else if ((cache[195] & 0x80) == 0x80) {
-			/* only page 2 and 3 */
-			ret = qsfp_read(ppd, target, 640, cache + 384, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-			ret = qsfp_read(ppd, target, 896, cache + 512, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-		} else if ((cache[195] & 0x40) == 0x40) {
-			/* only page 1 and 3 */
-			ret = qsfp_read(ppd, target, 384, cache + 256, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-			ret = qsfp_read(ppd, target, 896, cache + 512, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-		} else {
-			/* only page 3 */
-			ret = qsfp_read(ppd, target, 896, cache + 512, 128);
-			if (ret <= 0 || ret != 128) {
-				dd_dev_info(ppd->dd, "%s failed\n", __func__);
-				goto bail;
-			}
-		}
-	}
-
-	release_chip_resource(ppd->dd, qsfp_resource(ppd->dd));
-
-	spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
-	ppd->qsfp_info.cache_valid = 1;
-	ppd->qsfp_info.cache_refresh_required = 0;
-	spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock, flags);
-
-	return 0;
-
-bail:
-	release_chip_resource(ppd->dd, qsfp_resource(ppd->dd));
-bail_no_release:
-	memset(cache, 0, (QSFP_MAX_NUM_PAGES * 128));
-	return ret;
-}
-
-const char * const hfi1_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 qsfp_mod_present(struct hfi1_pportdata *ppd)
-{
-	struct hfi1_devdata *dd = ppd->dd;
-	u64 reg;
-
-	reg = read_csr(dd, dd->hfi1_id ? ASIC_QSFP2_IN : ASIC_QSFP1_IN);
-	return !(reg & QSFP_HFI0_MODPRST_N);
-}
-
-/*
- * This function maps QSFP memory addresses in 128 byte chunks in the following
- * fashion per the CableInfo SMA query definition in the IBA 1.3 spec/OPA Gen 1
- * spec
- * For addr 000-127, lower page 00h
- * For addr 128-255, upper page 00h
- * For addr 256-383, upper page 01h
- * For addr 384-511, upper page 02h
- * For addr 512-639, upper page 03h
- *
- * For addresses beyond this range, it returns the invalid range of data buffer
- * set to 0.
- * For upper pages that are optional, if they are not valid, returns the
- * particular range of bytes in the data buffer set to 0.
- */
-int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr, u32 len,
-		   u8 *data)
-{
-	struct hfi1_pportdata *ppd;
-	u32 excess_len = 0;
-	int ret = 0;
-
-	if (port_num > dd->num_pports || port_num < 1) {
-		dd_dev_info(dd, "%s: Invalid port number %d\n",
-			    __func__, port_num);
-		ret = -EINVAL;
-		goto set_zeroes;
-	}
-
-	ppd = dd->pport + (port_num - 1);
-	if (!qsfp_mod_present(ppd)) {
-		ret = -ENODEV;
-		goto set_zeroes;
-	}
-
-	if (!ppd->qsfp_info.cache_valid) {
-		ret = -EINVAL;
-		goto set_zeroes;
-	}
-
-	if (addr >= (QSFP_MAX_NUM_PAGES * 128)) {
-		ret = -ERANGE;
-		goto set_zeroes;
-	}
-
-	if ((addr + len) > (QSFP_MAX_NUM_PAGES * 128)) {
-		excess_len = (addr + len) - (QSFP_MAX_NUM_PAGES * 128);
-		memcpy(data, &ppd->qsfp_info.cache[addr], (len - excess_len));
-		data += (len - excess_len);
-		goto set_zeroes;
-	}
-
-	memcpy(data, &ppd->qsfp_info.cache[addr], len);
-	return 0;
-
-set_zeroes:
-	memset(data, 0, excess_len);
-	return ret;
-}
-
-int qsfp_dump(struct hfi1_pportdata *ppd, char *buf, int len)
-{
-	u8 *cache = &ppd->qsfp_info.cache[0];
-	u8 bin_buff[QSFP_DUMP_CHUNK];
-	char lenstr[6];
-	int sofar;
-	int bidx = 0;
-	u8 *atten = &cache[QSFP_ATTEN_OFFS];
-	u8 *vendor_oui = &cache[QSFP_VOUI_OFFS];
-
-	sofar = 0;
-	lenstr[0] = ' ';
-	lenstr[1] = '\0';
-
-	if (ppd->qsfp_info.cache_valid) {
-		if (QSFP_IS_CU(cache[QSFP_MOD_TECH_OFFS]))
-			sprintf(lenstr, "%dM ", cache[QSFP_MOD_LEN_OFFS]);
-
-		sofar += scnprintf(buf + sofar, len - sofar, "PWR:%.3sW\n",
-				pwr_codes +
-				(QSFP_PWR(cache[QSFP_MOD_PWR_OFFS]) * 4));
-
-		sofar += scnprintf(buf + sofar, len - sofar, "TECH:%s%s\n",
-				lenstr,
-			hfi1_qsfp_devtech[(cache[QSFP_MOD_TECH_OFFS]) >> 4]);
-
-		sofar += scnprintf(buf + sofar, len - sofar, "Vendor:%.*s\n",
-				   QSFP_VEND_LEN, &cache[QSFP_VEND_OFFS]);
-
-		sofar += scnprintf(buf + sofar, len - sofar, "OUI:%06X\n",
-				   QSFP_OUI(vendor_oui));
-
-		sofar += scnprintf(buf + sofar, len - sofar, "Part#:%.*s\n",
-				   QSFP_PN_LEN, &cache[QSFP_PN_OFFS]);
-
-		sofar += scnprintf(buf + sofar, len - sofar, "Rev:%.*s\n",
-				   QSFP_REV_LEN, &cache[QSFP_REV_OFFS]);
-
-		if (QSFP_IS_CU(cache[QSFP_MOD_TECH_OFFS]))
-			sofar += scnprintf(buf + sofar, len - sofar,
-				"Atten:%d, %d\n",
-				QSFP_ATTEN_SDR(atten),
-				QSFP_ATTEN_DDR(atten));
-
-		sofar += scnprintf(buf + sofar, len - sofar, "Serial:%.*s\n",
-				   QSFP_SN_LEN, &cache[QSFP_SN_OFFS]);
-
-		sofar += scnprintf(buf + sofar, len - sofar, "Date:%.*s\n",
-				   QSFP_DATE_LEN, &cache[QSFP_DATE_OFFS]);
-
-		sofar += scnprintf(buf + sofar, len - sofar, "Lot:%.*s\n",
-				   QSFP_LOT_LEN, &cache[QSFP_LOT_OFFS]);
-
-		while (bidx < QSFP_DEFAULT_HDR_CNT) {
-			int iidx;
-
-			memcpy(bin_buff, &cache[bidx], QSFP_DUMP_CHUNK);
-			for (iidx = 0; iidx < QSFP_DUMP_CHUNK; ++iidx) {
-				sofar += scnprintf(buf + sofar, len - sofar,
-					" %02X", bin_buff[iidx]);
-			}
-			sofar += scnprintf(buf + sofar, len - sofar, "\n");
-			bidx += QSFP_DUMP_CHUNK;
-		}
-	}
-	return sofar;
-}