forked from Minki/linux
f48ad614c1
The TODO list for the hfi1 driver was completed during 4.6. In addition other objections raised (which are far beyond what was in the TODO list) have been addressed as well. It is now time to remove the driver from staging and into the drivers/infiniband sub-tree. Reviewed-by: Jubin John <jubin.john@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
241 lines
8.9 KiB
C
241 lines
8.9 KiB
C
/*
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* Copyright(c) 2015, 2016 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* QSFP support common definitions, for hfi driver */
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#define QSFP_DEV 0xA0
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#define QSFP_PWR_LAG_MSEC 2000
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#define QSFP_MODPRS_LAG_MSEC 20
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/* 128 byte pages, per SFF 8636 rev 2.4 */
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#define QSFP_MAX_NUM_PAGES 5
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/*
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* Below are masks for QSFP pins. Pins are the same for HFI0 and HFI1.
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* _N means asserted low
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*/
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#define QSFP_HFI0_I2CCLK BIT(0)
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#define QSFP_HFI0_I2CDAT BIT(1)
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#define QSFP_HFI0_RESET_N BIT(2)
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#define QSFP_HFI0_INT_N BIT(3)
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#define QSFP_HFI0_MODPRST_N BIT(4)
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/* QSFP is paged at 256 bytes */
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#define QSFP_PAGESIZE 256
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/* Reads/writes cannot cross 128 byte boundaries */
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#define QSFP_RW_BOUNDARY 128
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/* number of bytes in i2c offset for QSFP devices */
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#define __QSFP_OFFSET_SIZE 1 /* num address bytes */
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#define QSFP_OFFSET_SIZE (__QSFP_OFFSET_SIZE << 8) /* shifted value */
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/* Defined fields that Intel requires of qualified cables */
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/* Byte 0 is Identifier, not checked */
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/* Byte 1 is reserved "status MSB" */
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#define QSFP_TX_CTRL_BYTE_OFFS 86
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#define QSFP_PWR_CTRL_BYTE_OFFS 93
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#define QSFP_CDR_CTRL_BYTE_OFFS 98
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#define QSFP_PAGE_SELECT_BYTE_OFFS 127
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/* Byte 128 is Identifier: must be 0x0c for QSFP, or 0x0d for QSFP+ */
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#define QSFP_MOD_ID_OFFS 128
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/*
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* Byte 129 is "Extended Identifier".
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* For bits [7:6]: 0:1.5W, 1:2.0W, 2:2.5W, 3:3.5W
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* For bits [1:0]: 0:Unused, 1:4W, 2:4.5W, 3:5W
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*/
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#define QSFP_MOD_PWR_OFFS 129
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/* Byte 130 is Connector type. Not Intel req'd */
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/* Bytes 131..138 are Transceiver types, bit maps for various tech, none IB */
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/* Byte 139 is encoding. code 0x01 is 8b10b. Not Intel req'd */
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/* byte 140 is nominal bit-rate, in units of 100Mbits/sec */
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#define QSFP_NOM_BIT_RATE_100_OFFS 140
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/* Byte 141 is Extended Rate Select. Not Intel req'd */
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/* Bytes 142..145 are lengths for various fiber types. Not Intel req'd */
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/* Byte 146 is length for Copper. Units of 1 meter */
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#define QSFP_MOD_LEN_OFFS 146
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/*
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* Byte 147 is Device technology. D0..3 not Intel req'd
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* D4..7 select from 15 choices, translated by table:
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*/
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#define QSFP_MOD_TECH_OFFS 147
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extern const char *const hfi1_qsfp_devtech[16];
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/* Active Equalization includes fiber, copper full EQ, and copper near Eq */
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#define QSFP_IS_ACTIVE(tech) ((0xA2FF >> ((tech) >> 4)) & 1)
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/* Active Equalization includes fiber, copper full EQ, and copper far Eq */
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#define QSFP_IS_ACTIVE_FAR(tech) ((0x32FF >> ((tech) >> 4)) & 1)
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/* Attenuation should be valid for copper other than full/near Eq */
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#define QSFP_HAS_ATTEN(tech) ((0x4D00 >> ((tech) >> 4)) & 1)
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/* Length is only valid if technology is "copper" */
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#define QSFP_IS_CU(tech) ((0xED00 >> ((tech) >> 4)) & 1)
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#define QSFP_TECH_1490 9
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#define QSFP_OUI(oui) (((unsigned)oui[0] << 16) | ((unsigned)oui[1] << 8) | \
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oui[2])
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#define QSFP_OUI_AMPHENOL 0x415048
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#define QSFP_OUI_FINISAR 0x009065
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#define QSFP_OUI_GORE 0x002177
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/* Bytes 148..163 are Vendor Name, Left-justified Blank-filled */
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#define QSFP_VEND_OFFS 148
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#define QSFP_VEND_LEN 16
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/* Byte 164 is IB Extended transceiver codes Bits D0..3 are SDR,DDR,QDR,EDR */
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#define QSFP_IBXCV_OFFS 164
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/* Bytes 165..167 are Vendor OUI number */
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#define QSFP_VOUI_OFFS 165
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#define QSFP_VOUI_LEN 3
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/* Bytes 168..183 are Vendor Part Number, string */
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#define QSFP_PN_OFFS 168
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#define QSFP_PN_LEN 16
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/* Bytes 184,185 are Vendor Rev. Left Justified, Blank-filled */
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#define QSFP_REV_OFFS 184
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#define QSFP_REV_LEN 2
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/*
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* Bytes 186,187 are Wavelength, if Optical. Not Intel req'd
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* If copper, they are attenuation in dB:
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* Byte 186 is at 2.5Gb/sec (SDR), Byte 187 at 5.0Gb/sec (DDR)
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*/
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#define QSFP_ATTEN_OFFS 186
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#define QSFP_ATTEN_LEN 2
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/*
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* Bytes 188,189 are Wavelength tolerance, if optical
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* If copper, they are attenuation in dB:
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* Byte 188 is at 12.5 Gb/s, Byte 189 at 25 Gb/s
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*/
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#define QSFP_CU_ATTEN_7G_OFFS 188
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#define QSFP_CU_ATTEN_12G_OFFS 189
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/* Byte 190 is Max Case Temp. Not Intel req'd */
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/* Byte 191 is LSB of sum of bytes 128..190. Not Intel req'd */
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#define QSFP_CC_OFFS 191
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#define QSFP_EQ_INFO_OFFS 193
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#define QSFP_CDR_INFO_OFFS 194
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/* Bytes 196..211 are Serial Number, String */
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#define QSFP_SN_OFFS 196
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#define QSFP_SN_LEN 16
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/* Bytes 212..219 are date-code YYMMDD (MM==1 for Jan) */
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#define QSFP_DATE_OFFS 212
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#define QSFP_DATE_LEN 6
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/* Bytes 218,219 are optional lot-code, string */
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#define QSFP_LOT_OFFS 218
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#define QSFP_LOT_LEN 2
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/* Bytes 220, 221 indicate monitoring options, Not Intel req'd */
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/* Byte 222 indicates nominal bitrate in units of 250Mbits/sec */
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#define QSFP_NOM_BIT_RATE_250_OFFS 222
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/* Byte 223 is LSB of sum of bytes 192..222 */
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#define QSFP_CC_EXT_OFFS 223
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/*
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* Interrupt flag masks
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*/
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#define QSFP_DATA_NOT_READY 0x01
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#define QSFP_HIGH_TEMP_ALARM 0x80
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#define QSFP_LOW_TEMP_ALARM 0x40
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#define QSFP_HIGH_TEMP_WARNING 0x20
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#define QSFP_LOW_TEMP_WARNING 0x10
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#define QSFP_HIGH_VCC_ALARM 0x80
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#define QSFP_LOW_VCC_ALARM 0x40
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#define QSFP_HIGH_VCC_WARNING 0x20
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#define QSFP_LOW_VCC_WARNING 0x10
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#define QSFP_HIGH_POWER_ALARM 0x88
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#define QSFP_LOW_POWER_ALARM 0x44
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#define QSFP_HIGH_POWER_WARNING 0x22
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#define QSFP_LOW_POWER_WARNING 0x11
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#define QSFP_HIGH_BIAS_ALARM 0x88
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#define QSFP_LOW_BIAS_ALARM 0x44
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#define QSFP_HIGH_BIAS_WARNING 0x22
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#define QSFP_LOW_BIAS_WARNING 0x11
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#define QSFP_ATTEN_SDR(attenarray) (attenarray[0])
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#define QSFP_ATTEN_DDR(attenarray) (attenarray[1])
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/*
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* struct qsfp_data encapsulates state of QSFP device for one port.
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* it will be part of port-specific data if a board supports QSFP.
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*
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* Since multiple board-types use QSFP, and their pport_data structs
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* differ (in the chip-specific section), we need a pointer to its head.
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*
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* Avoiding premature optimization, we will have one work_struct per port,
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* and let the qsfp_lock arbitrate access to common resources.
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*
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*/
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struct qsfp_data {
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/* Helps to find our way */
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struct hfi1_pportdata *ppd;
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struct work_struct qsfp_work;
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u8 cache[QSFP_MAX_NUM_PAGES * 128];
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/* protect qsfp data */
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spinlock_t qsfp_lock;
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u8 check_interrupt_flags;
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u8 reset_needed;
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u8 limiting_active;
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u8 cache_valid;
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u8 cache_refresh_required;
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};
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int refresh_qsfp_cache(struct hfi1_pportdata *ppd,
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struct qsfp_data *cp);
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int get_qsfp_power_class(u8 power_byte);
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int qsfp_mod_present(struct hfi1_pportdata *ppd);
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int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr,
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u32 len, u8 *data);
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int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
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int offset, void *bp, int len);
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int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
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int offset, void *bp, int len);
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int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
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int len);
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int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
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int len);
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int one_qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
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int len);
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int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
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int len);
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