diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/platform.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/platform.c | 893 |
1 files changed, 0 insertions, 893 deletions
diff --git a/drivers/staging/rdma/hfi1/platform.c b/drivers/staging/rdma/hfi1/platform.c deleted file mode 100644 index 0a1d07458..000000000 --- a/drivers/staging/rdma/hfi1/platform.c +++ /dev/null @@ -1,893 +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 "hfi.h" -#include "efivar.h" - -void get_platform_config(struct hfi1_devdata *dd) -{ - int ret = 0; - unsigned long size = 0; - u8 *temp_platform_config = NULL; - - ret = read_hfi1_efi_var(dd, "configuration", &size, - (void **)&temp_platform_config); - if (ret) { - dd_dev_info(dd, - "%s: Failed to get platform config from UEFI, falling back to request firmware\n", - __func__); - /* fall back to request firmware */ - platform_config_load = 1; - goto bail; - } - - dd->platform_config.data = temp_platform_config; - dd->platform_config.size = size; - -bail: - /* exit */; -} - -void free_platform_config(struct hfi1_devdata *dd) -{ - if (!platform_config_load) { - /* - * was loaded from EFI, release memory - * allocated by read_efi_var - */ - kfree(dd->platform_config.data); - } - /* - * else do nothing, dispose_firmware will release - * struct firmware platform_config on driver exit - */ -} - -int set_qsfp_tx(struct hfi1_pportdata *ppd, int on) -{ - u8 tx_ctrl_byte = on ? 0x0 : 0xF; - int ret = 0; - - ret = qsfp_write(ppd, ppd->dd->hfi1_id, QSFP_TX_CTRL_BYTE_OFFS, - &tx_ctrl_byte, 1); - /* we expected 1, so consider 0 an error */ - if (ret == 0) - ret = -EIO; - else if (ret == 1) - ret = 0; - return ret; -} - -static int qual_power(struct hfi1_pportdata *ppd) -{ - u32 cable_power_class = 0, power_class_max = 0; - u8 *cache = ppd->qsfp_info.cache; - int ret = 0; - - ret = get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_SYSTEM_TABLE, 0, - SYSTEM_TABLE_QSFP_POWER_CLASS_MAX, &power_class_max, 4); - if (ret) - return ret; - - if (QSFP_HIGH_PWR(cache[QSFP_MOD_PWR_OFFS]) != 4) - cable_power_class = QSFP_HIGH_PWR(cache[QSFP_MOD_PWR_OFFS]); - else - cable_power_class = QSFP_PWR(cache[QSFP_MOD_PWR_OFFS]); - - if (cable_power_class <= 3 && cable_power_class > (power_class_max - 1)) - ppd->offline_disabled_reason = - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY); - else if (cable_power_class > 4 && cable_power_class > (power_class_max)) - ppd->offline_disabled_reason = - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY); - /* - * cable_power_class will never have value 4 as this simply - * means the high power settings are unused - */ - - if (ppd->offline_disabled_reason == - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY)) { - dd_dev_info( - ppd->dd, - "%s: Port disabled due to system power restrictions\n", - __func__); - ret = -EPERM; - } - return ret; -} - -static int qual_bitrate(struct hfi1_pportdata *ppd) -{ - u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled; - u8 *cache = ppd->qsfp_info.cache; - - if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G) && - cache[QSFP_NOM_BIT_RATE_250_OFFS] < 0x64) - ppd->offline_disabled_reason = - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY); - - if ((lss & OPA_LINK_SPEED_12_5G) && (lse & OPA_LINK_SPEED_12_5G) && - cache[QSFP_NOM_BIT_RATE_100_OFFS] < 0x7D) - ppd->offline_disabled_reason = - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY); - - if (ppd->offline_disabled_reason == - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY)) { - dd_dev_info( - ppd->dd, - "%s: Cable failed bitrate check, disabling port\n", - __func__); - return -EPERM; - } - return 0; -} - -static int set_qsfp_high_power(struct hfi1_pportdata *ppd) -{ - u8 cable_power_class = 0, power_ctrl_byte = 0; - u8 *cache = ppd->qsfp_info.cache; - int ret; - - if (QSFP_HIGH_PWR(cache[QSFP_MOD_PWR_OFFS]) != 4) - cable_power_class = QSFP_HIGH_PWR(cache[QSFP_MOD_PWR_OFFS]); - else - cable_power_class = QSFP_PWR(cache[QSFP_MOD_PWR_OFFS]); - - if (cable_power_class) { - power_ctrl_byte = cache[QSFP_PWR_CTRL_BYTE_OFFS]; - - power_ctrl_byte |= 1; - power_ctrl_byte &= ~(0x2); - - ret = qsfp_write(ppd, ppd->dd->hfi1_id, - QSFP_PWR_CTRL_BYTE_OFFS, - &power_ctrl_byte, 1); - if (ret != 1) - return -EIO; - - if (cable_power_class > 3) { - /* > power class 4*/ - power_ctrl_byte |= (1 << 2); - ret = qsfp_write(ppd, ppd->dd->hfi1_id, - QSFP_PWR_CTRL_BYTE_OFFS, - &power_ctrl_byte, 1); - if (ret != 1) - return -EIO; - } - - /* SFF 8679 rev 1.7 LPMode Deassert time */ - msleep(300); - } - return 0; -} - -static void apply_rx_cdr(struct hfi1_pportdata *ppd, - u32 rx_preset_index, - u8 *cdr_ctrl_byte) -{ - u32 rx_preset; - u8 *cache = ppd->qsfp_info.cache; - - if (!((cache[QSFP_MOD_PWR_OFFS] & 0x4) && - (cache[QSFP_CDR_INFO_OFFS] & 0x40))) - return; - - /* rx_preset preset to zero to catch error */ - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, - rx_preset_index, RX_PRESET_TABLE_QSFP_RX_CDR_APPLY, - &rx_preset, 4); - - if (!rx_preset) { - dd_dev_info( - ppd->dd, - "%s: RX_CDR_APPLY is set to disabled\n", - __func__); - return; - } - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, - rx_preset_index, RX_PRESET_TABLE_QSFP_RX_CDR, - &rx_preset, 4); - - /* Expand cdr setting to all 4 lanes */ - rx_preset = (rx_preset | (rx_preset << 1) | - (rx_preset << 2) | (rx_preset << 3)); - - if (rx_preset) { - *cdr_ctrl_byte |= rx_preset; - } else { - *cdr_ctrl_byte &= rx_preset; - /* Preserve current TX CDR status */ - *cdr_ctrl_byte |= (cache[QSFP_CDR_CTRL_BYTE_OFFS] & 0xF0); - } -} - -static void apply_tx_cdr(struct hfi1_pportdata *ppd, - u32 tx_preset_index, - u8 *ctr_ctrl_byte) -{ - u32 tx_preset; - u8 *cache = ppd->qsfp_info.cache; - - if (!((cache[QSFP_MOD_PWR_OFFS] & 0x8) && - (cache[QSFP_CDR_INFO_OFFS] & 0x80))) - return; - - get_platform_config_field( - ppd->dd, - PLATFORM_CONFIG_TX_PRESET_TABLE, tx_preset_index, - TX_PRESET_TABLE_QSFP_TX_CDR_APPLY, &tx_preset, 4); - - if (!tx_preset) { - dd_dev_info( - ppd->dd, - "%s: TX_CDR_APPLY is set to disabled\n", - __func__); - return; - } - get_platform_config_field( - ppd->dd, - PLATFORM_CONFIG_TX_PRESET_TABLE, - tx_preset_index, - TX_PRESET_TABLE_QSFP_TX_CDR, &tx_preset, 4); - - /* Expand cdr setting to all 4 lanes */ - tx_preset = (tx_preset | (tx_preset << 1) | - (tx_preset << 2) | (tx_preset << 3)); - - if (tx_preset) - *ctr_ctrl_byte |= (tx_preset << 4); - else - /* Preserve current/determined RX CDR status */ - *ctr_ctrl_byte &= ((tx_preset << 4) | 0xF); -} - -static void apply_cdr_settings( - struct hfi1_pportdata *ppd, u32 rx_preset_index, - u32 tx_preset_index) -{ - u8 *cache = ppd->qsfp_info.cache; - u8 cdr_ctrl_byte = cache[QSFP_CDR_CTRL_BYTE_OFFS]; - - apply_rx_cdr(ppd, rx_preset_index, &cdr_ctrl_byte); - - apply_tx_cdr(ppd, tx_preset_index, &cdr_ctrl_byte); - - qsfp_write(ppd, ppd->dd->hfi1_id, QSFP_CDR_CTRL_BYTE_OFFS, - &cdr_ctrl_byte, 1); -} - -static void apply_tx_eq_auto(struct hfi1_pportdata *ppd) -{ - u8 *cache = ppd->qsfp_info.cache; - u8 tx_eq; - - if (!(cache[QSFP_EQ_INFO_OFFS] & 0x8)) - return; - /* Disable adaptive TX EQ if present */ - tx_eq = cache[(128 * 3) + 241]; - tx_eq &= 0xF0; - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 241, &tx_eq, 1); -} - -static void apply_tx_eq_prog(struct hfi1_pportdata *ppd, u32 tx_preset_index) -{ - u8 *cache = ppd->qsfp_info.cache; - u32 tx_preset; - u8 tx_eq; - - if (!(cache[QSFP_EQ_INFO_OFFS] & 0x4)) - return; - - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, - tx_preset_index, TX_PRESET_TABLE_QSFP_TX_EQ_APPLY, - &tx_preset, 4); - if (!tx_preset) { - dd_dev_info( - ppd->dd, - "%s: TX_EQ_APPLY is set to disabled\n", - __func__); - return; - } - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, - tx_preset_index, TX_PRESET_TABLE_QSFP_TX_EQ, - &tx_preset, 4); - - if (((cache[(128 * 3) + 224] & 0xF0) >> 4) < tx_preset) { - dd_dev_info( - ppd->dd, - "%s: TX EQ %x unsupported\n", - __func__, tx_preset); - - dd_dev_info( - ppd->dd, - "%s: Applying EQ %x\n", - __func__, cache[608] & 0xF0); - - tx_preset = (cache[608] & 0xF0) >> 4; - } - - tx_eq = tx_preset | (tx_preset << 4); - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 234, &tx_eq, 1); - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 235, &tx_eq, 1); -} - -static void apply_rx_eq_emp(struct hfi1_pportdata *ppd, u32 rx_preset_index) -{ - u32 rx_preset; - u8 rx_eq, *cache = ppd->qsfp_info.cache; - - if (!(cache[QSFP_EQ_INFO_OFFS] & 0x2)) - return; - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, - rx_preset_index, RX_PRESET_TABLE_QSFP_RX_EMP_APPLY, - &rx_preset, 4); - - if (!rx_preset) { - dd_dev_info( - ppd->dd, - "%s: RX_EMP_APPLY is set to disabled\n", - __func__); - return; - } - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, - rx_preset_index, RX_PRESET_TABLE_QSFP_RX_EMP, - &rx_preset, 4); - - if ((cache[(128 * 3) + 224] & 0xF) < rx_preset) { - dd_dev_info( - ppd->dd, - "%s: Requested RX EMP %x\n", - __func__, rx_preset); - - dd_dev_info( - ppd->dd, - "%s: Applying supported EMP %x\n", - __func__, cache[608] & 0xF); - - rx_preset = cache[608] & 0xF; - } - - rx_eq = rx_preset | (rx_preset << 4); - - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 236, &rx_eq, 1); - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 237, &rx_eq, 1); -} - -static void apply_eq_settings(struct hfi1_pportdata *ppd, - u32 rx_preset_index, u32 tx_preset_index) -{ - u8 *cache = ppd->qsfp_info.cache; - - /* no point going on w/o a page 3 */ - if (cache[2] & 4) { - dd_dev_info(ppd->dd, - "%s: Upper page 03 not present\n", - __func__); - return; - } - - apply_tx_eq_auto(ppd); - - apply_tx_eq_prog(ppd, tx_preset_index); - - apply_rx_eq_emp(ppd, rx_preset_index); -} - -static void apply_rx_amplitude_settings( - struct hfi1_pportdata *ppd, u32 rx_preset_index, - u32 tx_preset_index) -{ - u32 rx_preset; - u8 rx_amp = 0, i = 0, preferred = 0, *cache = ppd->qsfp_info.cache; - - /* no point going on w/o a page 3 */ - if (cache[2] & 4) { - dd_dev_info(ppd->dd, - "%s: Upper page 03 not present\n", - __func__); - return; - } - if (!(cache[QSFP_EQ_INFO_OFFS] & 0x1)) { - dd_dev_info(ppd->dd, - "%s: RX_AMP_APPLY is set to disabled\n", - __func__); - return; - } - - get_platform_config_field(ppd->dd, - PLATFORM_CONFIG_RX_PRESET_TABLE, - rx_preset_index, - RX_PRESET_TABLE_QSFP_RX_AMP_APPLY, - &rx_preset, 4); - - if (!rx_preset) { - dd_dev_info(ppd->dd, - "%s: RX_AMP_APPLY is set to disabled\n", - __func__); - return; - } - get_platform_config_field(ppd->dd, - PLATFORM_CONFIG_RX_PRESET_TABLE, - rx_preset_index, - RX_PRESET_TABLE_QSFP_RX_AMP, - &rx_preset, 4); - - dd_dev_info(ppd->dd, - "%s: Requested RX AMP %x\n", - __func__, - rx_preset); - - for (i = 0; i < 4; i++) { - if (cache[(128 * 3) + 225] & (1 << i)) { - preferred = i; - if (preferred == rx_preset) - break; - } - } - - /* - * Verify that preferred RX amplitude is not just a - * fall through of the default - */ - if (!preferred && !(cache[(128 * 3) + 225] & 0x1)) { - dd_dev_info(ppd->dd, "No supported RX AMP, not applying\n"); - return; - } - - dd_dev_info(ppd->dd, - "%s: Applying RX AMP %x\n", __func__, preferred); - - rx_amp = preferred | (preferred << 4); - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 238, &rx_amp, 1); - qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 239, &rx_amp, 1); -} - -#define OPA_INVALID_INDEX 0xFFF - -static void apply_tx_lanes(struct hfi1_pportdata *ppd, u8 field_id, - u32 config_data, const char *message) -{ - u8 i; - int ret = HCMD_SUCCESS; - - for (i = 0; i < 4; i++) { - ret = load_8051_config(ppd->dd, field_id, i, config_data); - if (ret != HCMD_SUCCESS) { - dd_dev_err( - ppd->dd, - "%s: %s for lane %u failed\n", - message, __func__, i); - } - } -} - -static void apply_tunings( - struct hfi1_pportdata *ppd, u32 tx_preset_index, - u8 tuning_method, u32 total_atten, u8 limiting_active) -{ - int ret = 0; - u32 config_data = 0, tx_preset = 0; - u8 precur = 0, attn = 0, postcur = 0, external_device_config = 0; - u8 *cache = ppd->qsfp_info.cache; - - /* Enable external device config if channel is limiting active */ - read_8051_config(ppd->dd, LINK_OPTIMIZATION_SETTINGS, - GENERAL_CONFIG, &config_data); - config_data |= limiting_active; - ret = load_8051_config(ppd->dd, LINK_OPTIMIZATION_SETTINGS, - GENERAL_CONFIG, config_data); - if (ret != HCMD_SUCCESS) - dd_dev_err( - ppd->dd, - "%s: Failed to set enable external device config\n", - __func__); - - config_data = 0; /* re-init */ - /* Pass tuning method to 8051 */ - read_8051_config(ppd->dd, LINK_TUNING_PARAMETERS, GENERAL_CONFIG, - &config_data); - config_data |= tuning_method; - ret = load_8051_config(ppd->dd, LINK_TUNING_PARAMETERS, GENERAL_CONFIG, - config_data); - if (ret != HCMD_SUCCESS) - dd_dev_err(ppd->dd, "%s: Failed to set tuning method\n", - __func__); - - /* Set same channel loss for both TX and RX */ - config_data = 0 | (total_atten << 16) | (total_atten << 24); - apply_tx_lanes(ppd, CHANNEL_LOSS_SETTINGS, config_data, - "Setting channel loss"); - - /* Inform 8051 of cable capabilities */ - if (ppd->qsfp_info.cache_valid) { - external_device_config = - ((cache[QSFP_MOD_PWR_OFFS] & 0x4) << 3) | - ((cache[QSFP_MOD_PWR_OFFS] & 0x8) << 2) | - ((cache[QSFP_EQ_INFO_OFFS] & 0x2) << 1) | - (cache[QSFP_EQ_INFO_OFFS] & 0x4); - ret = read_8051_config(ppd->dd, DC_HOST_COMM_SETTINGS, - GENERAL_CONFIG, &config_data); - /* Clear, then set the external device config field */ - config_data &= ~(0xFF << 24); - config_data |= (external_device_config << 24); - ret = load_8051_config(ppd->dd, DC_HOST_COMM_SETTINGS, - GENERAL_CONFIG, config_data); - if (ret != HCMD_SUCCESS) - dd_dev_info(ppd->dd, - "%s: Failed set ext device config params\n", - __func__); - } - - if (tx_preset_index == OPA_INVALID_INDEX) { - if (ppd->port_type == PORT_TYPE_QSFP && limiting_active) - dd_dev_info(ppd->dd, "%s: Invalid Tx preset index\n", - __func__); - return; - } - - /* Following for limiting active channels only */ - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, tx_preset_index, - TX_PRESET_TABLE_PRECUR, &tx_preset, 4); - precur = tx_preset; - - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, - tx_preset_index, TX_PRESET_TABLE_ATTN, &tx_preset, 4); - attn = tx_preset; - - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, - tx_preset_index, TX_PRESET_TABLE_POSTCUR, &tx_preset, 4); - postcur = tx_preset; - - config_data = precur | (attn << 8) | (postcur << 16); - - apply_tx_lanes(ppd, TX_EQ_SETTINGS, config_data, - "Applying TX settings"); -} - -static int tune_active_qsfp(struct hfi1_pportdata *ppd, u32 *ptr_tx_preset, - u32 *ptr_rx_preset, u32 *ptr_total_atten) -{ - int ret; - u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled; - u8 *cache = ppd->qsfp_info.cache; - - ret = acquire_chip_resource(ppd->dd, qsfp_resource(ppd->dd), QSFP_WAIT); - if (ret) { - dd_dev_err(ppd->dd, "%s: hfi%d: cannot lock i2c chain\n", - __func__, (int)ppd->dd->hfi1_id); - return ret; - } - - ppd->qsfp_info.limiting_active = 1; - - ret = set_qsfp_tx(ppd, 0); - if (ret) - goto bail_unlock; - - ret = qual_power(ppd); - if (ret) - goto bail_unlock; - - ret = qual_bitrate(ppd); - if (ret) - goto bail_unlock; - - if (ppd->qsfp_info.reset_needed) { - reset_qsfp(ppd); - ppd->qsfp_info.reset_needed = 0; - refresh_qsfp_cache(ppd, &ppd->qsfp_info); - } else { - ppd->qsfp_info.reset_needed = 1; - } - - ret = set_qsfp_high_power(ppd); - if (ret) - goto bail_unlock; - - if (cache[QSFP_EQ_INFO_OFFS] & 0x4) { - ret = get_platform_config_field( - ppd->dd, - PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_TX_PRESET_IDX_ACTIVE_EQ, - ptr_tx_preset, 4); - if (ret) { - *ptr_tx_preset = OPA_INVALID_INDEX; - goto bail_unlock; - } - } else { - ret = get_platform_config_field( - ppd->dd, - PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_TX_PRESET_IDX_ACTIVE_NO_EQ, - ptr_tx_preset, 4); - if (ret) { - *ptr_tx_preset = OPA_INVALID_INDEX; - goto bail_unlock; - } - } - - ret = get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_RX_PRESET_IDX, ptr_rx_preset, 4); - if (ret) { - *ptr_rx_preset = OPA_INVALID_INDEX; - goto bail_unlock; - } - - if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G)) - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_LOCAL_ATTEN_25G, ptr_total_atten, 4); - else if ((lss & OPA_LINK_SPEED_12_5G) && (lse & OPA_LINK_SPEED_12_5G)) - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_LOCAL_ATTEN_12G, ptr_total_atten, 4); - - apply_cdr_settings(ppd, *ptr_rx_preset, *ptr_tx_preset); - - apply_eq_settings(ppd, *ptr_rx_preset, *ptr_tx_preset); - - apply_rx_amplitude_settings(ppd, *ptr_rx_preset, *ptr_tx_preset); - - ret = set_qsfp_tx(ppd, 1); - -bail_unlock: - release_chip_resource(ppd->dd, qsfp_resource(ppd->dd)); - return ret; -} - -static int tune_qsfp(struct hfi1_pportdata *ppd, - u32 *ptr_tx_preset, u32 *ptr_rx_preset, - u8 *ptr_tuning_method, u32 *ptr_total_atten) -{ - u32 cable_atten = 0, remote_atten = 0, platform_atten = 0; - u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled; - int ret = 0; - u8 *cache = ppd->qsfp_info.cache; - - switch ((cache[QSFP_MOD_TECH_OFFS] & 0xF0) >> 4) { - case 0xA ... 0xB: - ret = get_platform_config_field( - ppd->dd, - PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_LOCAL_ATTEN_25G, - &platform_atten, 4); - if (ret) - return ret; - - if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G)) - cable_atten = cache[QSFP_CU_ATTEN_12G_OFFS]; - else if ((lss & OPA_LINK_SPEED_12_5G) && - (lse & OPA_LINK_SPEED_12_5G)) - cable_atten = cache[QSFP_CU_ATTEN_7G_OFFS]; - - /* Fallback to configured attenuation if cable memory is bad */ - if (cable_atten == 0 || cable_atten > 36) { - ret = get_platform_config_field( - ppd->dd, - PLATFORM_CONFIG_SYSTEM_TABLE, 0, - SYSTEM_TABLE_QSFP_ATTENUATION_DEFAULT_25G, - &cable_atten, 4); - if (ret) - return ret; - } - - ret = get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_REMOTE_ATTEN_25G, &remote_atten, 4); - if (ret) - return ret; - - *ptr_total_atten = platform_atten + cable_atten + remote_atten; - - *ptr_tuning_method = OPA_PASSIVE_TUNING; - break; - case 0x0 ... 0x9: /* fallthrough */ - case 0xC: /* fallthrough */ - case 0xE: - ret = tune_active_qsfp(ppd, ptr_tx_preset, ptr_rx_preset, - ptr_total_atten); - if (ret) - return ret; - - *ptr_tuning_method = OPA_ACTIVE_TUNING; - break; - case 0xD: /* fallthrough */ - case 0xF: - default: - dd_dev_info(ppd->dd, "%s: Unknown/unsupported cable\n", - __func__); - break; - } - return ret; -} - -/* - * This function communicates its success or failure via ppd->driver_link_ready - * Thus, it depends on its association with start_link(...) which checks - * driver_link_ready before proceeding with the link negotiation and - * initialization process. - */ -void tune_serdes(struct hfi1_pportdata *ppd) -{ - int ret = 0; - u32 total_atten = 0; - u32 remote_atten = 0, platform_atten = 0; - u32 rx_preset_index, tx_preset_index; - u8 tuning_method = 0, limiting_active = 0; - struct hfi1_devdata *dd = ppd->dd; - - rx_preset_index = OPA_INVALID_INDEX; - tx_preset_index = OPA_INVALID_INDEX; - - /* the link defaults to enabled */ - ppd->link_enabled = 1; - /* the driver link ready state defaults to not ready */ - ppd->driver_link_ready = 0; - ppd->offline_disabled_reason = HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE); - - /* Skip the tuning for testing (loopback != none) and simulations */ - if (loopback != LOOPBACK_NONE || - ppd->dd->icode == ICODE_FUNCTIONAL_SIMULATOR) { - ppd->driver_link_ready = 1; - return; - } - - ret = get_platform_config_field(ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_PORT_TYPE, &ppd->port_type, - 4); - if (ret) - ppd->port_type = PORT_TYPE_UNKNOWN; - - switch (ppd->port_type) { - case PORT_TYPE_DISCONNECTED: - ppd->offline_disabled_reason = - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_DISCONNECTED); - dd_dev_info(dd, "%s: Port disconnected, disabling port\n", - __func__); - goto bail; - case PORT_TYPE_FIXED: - /* platform_atten, remote_atten pre-zeroed to catch error */ - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_LOCAL_ATTEN_25G, &platform_atten, 4); - - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_REMOTE_ATTEN_25G, &remote_atten, 4); - - total_atten = platform_atten + remote_atten; - - tuning_method = OPA_PASSIVE_TUNING; - break; - case PORT_TYPE_VARIABLE: - if (qsfp_mod_present(ppd)) { - /* - * platform_atten, remote_atten pre-zeroed to - * catch error - */ - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_LOCAL_ATTEN_25G, - &platform_atten, 4); - - get_platform_config_field( - ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, - PORT_TABLE_REMOTE_ATTEN_25G, - &remote_atten, 4); - - total_atten = platform_atten + remote_atten; - - tuning_method = OPA_PASSIVE_TUNING; - } else - ppd->offline_disabled_reason = - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_CHASSIS_CONFIG); - break; - case PORT_TYPE_QSFP: - if (qsfp_mod_present(ppd)) { - refresh_qsfp_cache(ppd, &ppd->qsfp_info); - - if (ppd->qsfp_info.cache_valid) { - ret = tune_qsfp(ppd, - &tx_preset_index, - &rx_preset_index, - &tuning_method, - &total_atten); - - /* - * We may have modified the QSFP memory, so - * update the cache to reflect the changes - */ - refresh_qsfp_cache(ppd, &ppd->qsfp_info); - if (ret) - goto bail; - - limiting_active = - ppd->qsfp_info.limiting_active; - } else { - dd_dev_err(dd, - "%s: Reading QSFP memory failed\n", - __func__); - goto bail; - } - } else - ppd->offline_disabled_reason = - HFI1_ODR_MASK( - OPA_LINKDOWN_REASON_LOCAL_MEDIA_NOT_INSTALLED); - break; - default: - dd_dev_info(ppd->dd, "%s: Unknown port type\n", __func__); - ppd->port_type = PORT_TYPE_UNKNOWN; - tuning_method = OPA_UNKNOWN_TUNING; - total_atten = 0; - limiting_active = 0; - tx_preset_index = OPA_INVALID_INDEX; - break; - } - - if (ppd->offline_disabled_reason == - HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE)) - apply_tunings(ppd, tx_preset_index, tuning_method, - total_atten, limiting_active); - - if (!ret) - ppd->driver_link_ready = 1; - - return; -bail: - ppd->driver_link_ready = 0; -} |